Susan was relieved that Alan got home about ten minutes after she'd changed into her sexy red outfit, because she seemed to be getting more aroused and more anxious with each passing minute.
She waited until he was back in his room, then she knocked on his door. "Tiger? Can I come in?"
"Sure thing." He took a seat at the edge of his bed, assuming she wanted to talk to him about something for a while.
She came in and closed the door. Her face was blushing red with embarrassment, and she just whispered shyly, "Hi."
He'd been feeling relaxed and content. It had been hard for him to get into the mood of watching a movie, but he'd eventually managed to do so. While he wasn't about to forget the thrilling appointment earlier in the day, it wasn't occupying most of his thoughts, like it had prior to the movie. But that changed as soon as he saw his mother in her red outfit. His eyes bugged out and his jaw dropped open. He couldn't have exaggerated his expression any more if he tried.
Susan was shy to directly explain why she was dressed like that, and merely asked, "How was the movie?"
He played along, even as he continued to shamelessly gape. "Good, good."
"What did you see?"
That forced him to actually think, so he had to shake himself out of his horny stupor. Needless to say, his penis got fully erect in a flash. "Um... uh... 'The Tuxedo.' It's uh... it's kind of an action comedy starring Jackie Chan."
"I see. That's nice." There was a long awkward pause while Susan just stood there by the door. It took all her willpower not to cover her pussy mound and nipples with her hands. She truly felt more exposed than if she'd been completely naked.
Thinking about the movie got him to thinking about the movie's co-star, Jennifer Love Hewitt. You know, Jennifer looked pretty hot in the movie. But the funny thing is, even though she's known for her big boobs, she's got nothing on Mom. I hear she's a 36C. That's nothing! Mom is a 38G! Friggin' G! That's like, triple the size, I'm sure! C, D, E, F, G... That's waaaay larger! Mom is a BABE! And I swear her face is movie-star sexy too!
Susan finally decided to address the elephant in the room. "I'll bet you're wondering why I'm wearing this."
"Uh... yeah! I totally love that you wore that at dinner. You look so incredibly sexy that I can't even believe it! But you didn't look that keen on wearing it. I kinda gathered Aunt Suzy put you up to it."
"She did." Susan started to walk across the room, heading towards the chair in front of his desk. But once she started walking, her big breasts began bouncing wildly. She'd been extremely aroused before she'd even entered his room, and she almost had to stop for fear that she wouldn't make it to the chair before cumming loudly and noisily. Still, she gritted her teeth and steeled her willpower and managed to sit down in it.
Alan had been just starting to recover from seeing her in that outfit when watching her walk blew his mind all over again. He stared with mouth agape like a character in a comic book.
Prior to earlier that day, she would have been nothing but embarrassed to have her son ogle her like that. But something had changed after the appointment with Akami. She was still very embarrassed, but she was also highly aroused and even proud that her body was causing such a reaction.
She forced herself to press on. "To be honest, I'm kind of wondering why I'm wearing it too." She chuckled nervously. "Especially because this time, Suzanne didn't twist my arm to wear it."
"She didn't?!"
"No. Nurse Akami did."
"Akami?!"
"That's right. She called me while you were at the movie. Remember how she said she was going to call later and check up on the soreness of your, uh... your... member?" Susan had already been looking away, but saying that caused her to close her eyes for good measure.
"Oh yeah."
"Well... she wants me to check you now. She was quite insistent about it, actually. She told me I had to wear something sexy so you'd get, uh, well... you know."
"Erect?"
She opened her eyes and nodded. Her face reddened even more.
He was so very aroused that he was a bit reckless and just spoke his mind. "You don't have to worry about that! I'm so erect right now that it almost hurts!" He shifted his seating position, enabling her to see the large bulge in the pants that he'd worn to the movie.
"Oh my goodness!" Now it was Susan's turn to gawk shamelessly. She recalled the orgasms she'd experienced at the doctor's office, and she wondered if it was possible for her to climax spontaneously right then and there.
She tried to control her lusty thoughts and pressed on. "That's, uh... that's good. But, uh... Gosh, there's no easy way to say this, so I'm just going to up and say it." She shut her eyes tightly again. "Akami says you need to show me your member, your erect member! And not only that, but... well, she wants you to masturbate too! All the way to completion. So, so I can see if you're sore or not afterward!"
She felt relieved, having said all that. She belatedly remembered to ask, "That reminds me: are you feeling sore? You know... down there?"
He continued to ogle his voluptuous, gorgeous mother. The fact that she had her eyes shut meant he could enjoy the sight of her massive rack without getting embarrassed. That sight was made even more impressive by the fact that she was so worked up that she was breathing heavily. Her scandalous blazing-red outfit magnified and amplified every move of her big tits, so much so that she was forced to hold them from below to stop them from swinging around wildly. But that didn't stop their heaving; instead it made it look as if she was offering them to him on a platter.
He was panting and his heart was thumping hard and fast just like hers was. But he retained enough sense to realize that he needed to be careful in answering her questions about the soreness of his penis to avoid ruining the fun. In fact, his penis hadn't given him any trouble in the last few hours, other than that it had seemed to stay erect most of the time due to his memories of the appointment. He said, "Well, I don't really know. It feels okay, I guess. But what about when I cum? That's the big question."
Susan nodded. "That's what Nurse Akami said also. That's why she wants me to, uh, watch the whole thing. So... can we just... get this over with quickly? Please?"
"Okay, if you insist. I'll just... uh... take my pants off now. Is that okay?"
She silently nodded again.
Hot damn! He stood up, but found that his legs were feeling shaky and weak. He hastily pulled his pants and underwear off before his legs gave way altogether. He breathed a huge sigh of relief as he plopped back down on the edge of the bed.
Knowing that his mother's eyes were still closed, he closed his eyes as well. He needed a moment to at least try to calm himself somewhat. Oh my Lord! This is too much! It's like we're right back there at the appointment with Nurse Akami, except it's just Mom and me at home, and that's even MORE exciting! Anything could happen! She's going to watch me jack off while wearing THAT outfit! Fuck me!
Shit! This isn't helping! I'm seriously worried I'm going to cum before I can even start! I can't stand it!
He tried to clear his mind and take some slow, deep breaths. That didn't help much though, because there was simply no way for him to clear his mind of his horny thoughts about his super-stacked mother.
Also, he didn't have much time. Before he could do much slow breathing, Susan asked shyly, "Son? Are you ready?"
"Um, sure." He held his boner and pointed it up at her. Then he braced for impact when she opened her eyes.
She didn't realize how she looked, but she was staring at his erection with undisguised lusty desire. Furthermore, she was still holding her massive breasts from below, even as they kept surging up and down in time to her heavy breathing.
Her mouth hung open in the same way his had when she first came into the room. Oh my goodness! It's so BIG! So stiff! I'll bet it's HOT too! Gaawwwd, I can almost still feel the heat of it in my hand when I was stroking him earlier today and he was shooting into that cup! So hot!
As if she wasn't horny enough already, she remembered something else Akami had told her. "Um, Tiger? It just occurred to me... Nurse Akami said I needed to get up close, and I do mean really, really close, in order to check for soreness. She gave me a little lecture on what signs to look for. Is that okay with you?"
"Uh... sure." He hesitated to give permission, only because he worried that he was getting too aroused already. He had no idea how he'd manage to masturbate for very long if his mother was watching from close range. But he was willing to give it a try.
Alan's desk chair had rollers and it could roll even on the thick carpet. So Susan scooted herself and the chair up close, so close that he had to open his legs wide to make room. Then she leaned in for good measure.
Susan was still surprisingly clueless about how titillating moving her body in certain ways could be, and this was one such case. She didn't think to realize that if she bent way forward in her seat, her big tits would dangle down and appear even larger than they already were.
That was the final straw for Alan. He was simply holding his boner while thinking about stroking it. However, he was afraid to get started doing that because he didn't know how he could masturbate without cumming immediately. It turned out that even touching his penis was too much, with his mother leaning in close like that.
He was taken by surprise. By the time he shouted, "AAAH! Watch out!" his cum was already shooting out of his cock.
Funnily enough, both Alan and Susan had been so preoccupied by other highly distracting sights and thoughts that they hadn't given any consideration to where Alan's cum would go when it was time for him to blow his load. Susan hadn't thought about it during her phone call with Akami or in all the time she'd had to ruminate afterwards.
As a result, nature simply took its course. Since Susan was right in front of him and she was leaning in, there was no other option but for the cum to fly towards her, directly at her very large breasts.
Alan cried out again, "MOM! Watch out!" He was extremely distressed that he was cumming on his mother, but he couldn't think of what else to do. There was no way to stop the torrent urgently blasting out of his pulsing cock.
Susan quickly leaned back in her seat, but that didn't help much. His cum was still shooting in the same direction, only instead of flying just inches to get there, instead it was flying two or three feet. The only effect that had was to cause his cum to splatter over her in a wider area. Nearly all the cum still hit her tits, usually centered on her deep cleavage because that had been the focus of his attention, but a few stray strands reached her tummy or up towards her shoulders and neck.
She held her hands up helplessly and uselessly, and squealed just as helplessly, like a damsel in distress. "AAAAIIIIIEEE! Tiger! What are you doing?!"
By the time she'd said that, his orgasm was already petering out. He'd shot out a lot of cum, but like all male orgasms, it was over in a matter of seconds.
His orgasm came to an end, but his arousal most certainly did not. In fact, seeing his cum all over his mother's immense rack kept a mental orgasm of sorts still going for him. He was so aroused that he was downright dizzy. He hardly knew up from down.