"Come on, you have to be more mature. You can't make Mom worry about you again."
As Alex calmed himself back down, his mind was starting to get a little sleepy.
"What's taking them so long?"
After getting out of bed, he walked all the way to the hallway to see the two of them right behind Katherine's bedroom door.
Their heads tilted slightly to peek inside, with their body around the corner in an attempt to hide themselves.
Getting a little curious, Alex sneakily walked over to the two before tapping them on the back.
"Hey——"
"Ah!"
Both Sophia and Mary yelled out loud at the same time, getting scared as they turned around to see Alex right behind them.
"Who's there?"
Katherine's voice immediately sent the two girls running, leaving Alex confused as he watched them enter back to their room.
Just as he turned around, Katherine was right in front of him, her face blushing a little red as if she had some sort of exercise.
"Alex, why are you standing here in the middle of the night?" Katherine calmly asked.
"Sophia and Mary went to go get water, and I got a little worried that they were taking too long.
So, I decided to check... They were just right here earlier before running back to their room."
Katherine didn't doubt Alex's response as she had heard the girl's scream and the running footsteps earlier.
"Those two little brat... Alex, go inside my room for a second. I'm going to go teach those two a lesson."
Alex nodded in agreement as he headed inside Katherine's room, sitting on the bed and waiting patiently.
With a loud laughing sound from the other room, a chill suddenly traveled down Alex's spine.
"Why is Mom so mad? Did she put them into some sort of tickle torture?" Alex wondered as he continued to wait.
After a while, Katherine showed up with Sophia and Mary in her arms before dropping them onto the bed.
"How dare you two spy on your mom? If it wasn't for Alex, you two think you would have gotten away with it, didn't you?"
"I'm sorry, Mom... We just got a little curious. We didn't mean to spy on you."
"We will never do it again. I'm sorry, Mom."
Sophia and Mary both apologized, subduing Katherine's anger a little. But at the same time, Alex could feel both girls' anger as they looked him dead in the eyes.
"Don't you two dare look at your brother like that. If I catch you two hitting him, you two are going to be punished."
"Sorry."
Despite the two apologizing to Alex, he started to realize he might have snitched on them on something important.
"Mom, why are you punishing them? They were just looking at you in your room. It's not like you didn't check on us when we were asleep."
"Alex, it's a different situation. It's a girl's thing——"
"Mom, Alex is a girl too!" Mary grumpily interrupted.
"Doesn't matter. You two shouldn't be peaking at someone when they are having their alone time."
"Really? Alone time with the door opened?" Sophia pointed out.
"Come here, you little brats——"
As Katherine rolled up her sleeve, getting ready to punish the two, Alex's mind was more confused than ever.
"Sophia, Mary, what are you two talking about? What did you two see?" Alex curiously asked as they started running in a circle.
"Mom's hand was——"
"Alex, move out of the way. If I don't beat these two up tonight, they will never learn."
Katherine interrupted Mary from the finishing, trying to catch the two as they ran around Alex to use him as a shield.
After dodging a few times, Katherine got a little frustrated, casting some of the magic that caused both of them to freeze in place.
"Mom... were you touching yourself earlier?"
Alex's question caught Katherine a little off guard, but her face started to blush as if it were exactly what Sophia and Mary had seen.
"What are you saying? Ahem, Sophia and Mary, you two are grounded for the weekend."
As Katherine snapped her finger, the two girls were finally free from the spell.
"Mom, you don't have to be embarrassed. It's not like we had seen each other's body before. Besides, you already helped me masturbate for the first time.
You don't need to be so mad over Sophia and Mary being curious about... Ahem, I'm going back to sleep——"
Alex quickly changed his tone, realizing he had overdefended them by leaking a secret. But it was far too late as Sophia's and Mary's faces started to change.
"Mom! That's not fair! Why did you teach our brother in person how to masturbate?
We didn't even get a clear view or anything underneath the clothes either! Why don't you teach us how to do it hand by hand?"
Mary's childish argument made Katherine blush more and more red as she looked over at Alex in anger. In return, Alex awkwardly scratched his head, as it was far too late to hide the fact now.
"Mom... We are just a little curious. That's all. We didn't mean to offend you."
Seeing Sophia bowing down in apology again, Katherine let out a sigh before deciding something in her head.
"You three really are the bane of existence sometimes... You two really want me to teach you how to do it?"
Both girls nodded in curiosity. But Alex quickly got out of the bed, trying to leave.
"Come on, Alex, I know you have a vagina too. Don't you want to see how it is done?"
Sophia's words broke Alex's last defense in his head as he couldn't resist seeing it happen before his eyes.
Curiousness had taken over him, as it had almost always been a mystery to him how it was done with his own eyes.
"Ahem, you three sit over here and take off your clothes? This is the only time I'm teaching you guys again on this kind of stuff."
Both girls nodded in agreement again as they quickly threw their clothes aside before sitting down. However, Alex remained standing still next to the bed with his pants on.
"Alex? You okay?" Sophia asked, noticing his hesitation.
After a struggle, Alex's lower body took control over his mind as he took off his pants and underwear before sitting down.
All three of them immediately noticed his erect cock. Still, Katherine didn't make him leave the room, letting him stay on the bed next to his sisters.
"So to masturbate, you need to get into the right mood first... Like thinking of someone you love."
"Mom, do you think of Dad when that happens?" Sophia curiously asked.
Katherine blushed, but she nodded in agreement. Suddenly, Alex felt a little jealous of his dad before realizing how stupid that sounded.
After Katherine took off her underwear, she slowly moved her right hand towards her crotch.
"First, you want to spread your leg a little, then depending on your body, you move your finger to open the cover called the labia to find something bumpy.
That bumpy thing is call the clitoris... It's one of the way that can make a woman reach their climax."
As Katherine slowly opened her cover, a small little bump appeared that made her moan out a little as soon as she rubbed it.
Both Sophia and Mary began to reach their hands down, copying the same motion as they found their own immature clitoris.
"Hm!"
The two of them both moaned out at the same time, feeling a surge of pleasure hitting their mind before stopping.
"Alex, you don't want to try it?" Katherine asked, stopping as she looked over to him.
"I... I don't know." Alex shyly looked to the side, afraid of looking back at her eyes.
"Girl's genitalia feels a lot more intense. You sure you don't want to try it?"
Alex hesitated again, but eventually decided to try it out as he moved his hand further down, reaching right underneath his testicle in one hand.
With his other hand, he spread his labia open with the other, all three of the girls could see his clitoris and the entire vagina.
"Hm!"
Alex let out a moan as he rubbed it a little, feeling the same pleasure that the other three girls felt.
It was much less intense than playing with his cock, but the pleasure was much more constant and steady.
"Just keep exploring your body. Try to touch around the clitoris to see if your body feels a little different."
As all three of them followed Katherine's instructions, they soon found their own unique spot, which made it even more pleasurable.
"Now, you might noticed your finger is a little wet. That's the lubricant that your body naturally produces."
Katherine explained as she was starting to help the three by moving their finger up and down, then side to side against their clitoris.