She then pulled me up so I was then straddling her face with my hind legs. Sucking my dick into her mouth so fast causing me to spread my own legs a little further apart. Slurping, sucking, stroking my meat, it felt so good. I wined with pleasure. Red's grandma slid her night gown completely off her body. Then slid her beautiful breasts around my cock while still licking the tip. I couldn't help but add my own thrusts between her tits as well. I started to feel the knot form at the base of my penis. Her tits caught the first lump of it sliding up.
Grandma slid out from under me and got on all fours. I got up and mounted her from behind. Slid my cock into her still wet pussy. My knot kept sliding up my cock and soon it was at the base of her pussy. She could feel it and thrust backwards as I thrust inwards. Her pussy made a plopping noise as it surrounded my knot. She grunted as the new girth shocked her. At this point I lost all control and just started pounding away as fast as my legs and hips would let me. I felt her body losing its control with her own orgasm as I was losing mine deep into her body. I kept thrusting into her though I wasn't going to let my hard on go down. My knot diminished a little bit though. It sloshed out of her leaking my cum from between her legs. But she stayed in that position turning around and licking all the juices off my cock.
It being still suckled and licked renewed its hardness. The knot on the other hand diminished some but stayed out of the sheath at the base of my penis. Grandma turned back around and angled her butt at me, stroking my cock from behind her while guiding me to her ass. I pushed in slowly, causing her to moan loudly. While pushing into her my front paws were wrapped around her chest, my hind legs hitting the floor easily. I kept pushing into her until the knot was at the opening. Grams slammed backwards to push it into her. Shocked I didn't know what to do. I started thrusting in and out of her ass gently until she got used to me.
My knot started growing again. Grams groaned at the thickness, but kept up with the pace of my thrusts.
Suddenly the house door flew open and in walked Red. Luckily I was in the kitchen and red wouldn't be able to see me. But red had heard grams moans, she not able to tell if it was pleasure or pain she was hearing and ran to the kitchen. Saw me mounted and stuck inside her Grandma.
Red stood there dumbfounded. Grams just smiled at red. At first red just stood there watching me fuck grams. Red was still sore and stretched from the treatment she had just received from the buck, but was getting turned on by watching her grams getting some. So she started taking her dress off again. She walked over to me ran her hands down my side and caressed my balls as they slapped against her grams ass. Gently pulling on them and licking them increasing my own sensitivity.
Slowly even sliding a finger into my ass, while leaning down to lick my balls. Sliding her tongue up my balls, then sucking grams clit. She kept tickling my anus with her finger, while cupping my balls with her other hand.
That's when I couldn't take it anymore I shuddered and blew my load deep inside grams. I just let myself get soft enough to slide out. That's when red got a hold of my still semi hard cock and started sucking me to full hardness again. She lay down on her back and positioned me over her. Then pulled me into her (buck) stretched pussy, of which I easily filled including my knot.