You do

After you playfully slap your mothers ass you grab your pants pulling them and your underwear down letting your hard cock flop out and hit your mothers ass. You smile at the look on her face when this happens. Her eyes get big and wide when your cock hits her. After it hits her ass she turns her head and looks down at your hard cock, her eyes getting even bigger. "Holy shit Glen you are twice the size of your father." she says as she stares at your cock.

You smile even bigger when she says that to you. "Thanks mother I am happy to hear you say that, now lets see if you can handle your sons hard cock." you say to her as you grab your cock and guide it down her ass to her pussy lips rubbing the head over her pussy lips. When you do this she lets out another moan.

"Please be gentle with your mother." she says to you as she spreads her legs for you. Preparing herself to be impaled by her sons hard cock.

With this you grab your mothers hips and slowly push the head of your hard cock into her pussy. When you do this she lets out another moan before you push into her more slowly filling your mothers pussy with your hard cock. As you push into her more you feel how tight she is. "Fuck mother you are tight." you say as you keep pushing into her. Her moans filling the barn as you do.

"Fuck you are huge you are stretching mommy's pussy." she moans out as you fill her more. Pushing into her more and more until your cock is fully inside her pussy.