You motion to the kitchen after your sisters, but your mom stop you and pat coach near her, inviting you to sit here.
"Um, mom, you're really not mad at me?"
"Of course not! I think it's natural for us to have sex!"
"But we're family..."
"Just think about as taking your love to the next level..." - you feel as Lisa put her arm around your bottom. - "And you know, sweety, now I really want to take our love to the next level too."
"Uh, m-mom, is this really necessary?" - you still have doubts, although the thoughts of what's coming and your mother's fondling quickly made you hard. - "W-well, if you want..."
"Great, now take off your pants." - Lisa kissed your cheek and pull down her pencil skirt and panties revealing her quickly stiffening cock. You never seen it so close before, it was almost as big as Jessica's, maybe not that long but a little thicker. - "Come on sit down!"
Obviously you're going to sit not on the coach. You sit on your knees straddling Lisa's crotch facing her. Your dick twitch as mother's girlcock kissed your hole, then she place her hands on your hips and start slowly pushing you down and your two moan as her head popped inside.
"Tell me if it's too much for you, dear." - she says as she continue to pushing inch after inch inside.
"Ah, fine..." - you moan as your hands unconsciously begin squeezing her big boobs.
A minute or so later your butt meet with Lisa's thighs. Then she slowly lift you up and drop down then again and again faster and faster. The room is filled with moans and slapping your ass on her thighs, you think that your sister's is hear this and fully aware of what is going on here, but they decided to not interrupt your activity.
"Oh, mom, I'm cumming!" - you moan, and then your mom suddenly lift you up and took your cock in her mouth. Feeling this is enough to push you over the edge and soon your dick is twitching and painting her mouth white. Lisa hold her orgasm until your is over and slam her member back into your asshole, and it almost immediately began stuffing you with loads of her cum.
"Oh, you have a great ass, Dougie!" - says mother a little after.
"Uh, thanks... Well, I'm too tired, I'm going in bed, okay?"
"Sure, I'm make sure to leave some cake for you."
With that you pull out her cock from your rear, took your clothes and head to your room. You're indeed really tired as you fall asleep the moment your hear touched your pillow.