You have little control

Isabelle has a sly smile as she takes your cock into her mouth. “Is this what Mom, did, John?”

You groan in response. “Lis… Lisa… used to let me eat her… out… while…”

Izzi doesn’t make you finish, which is good, because it would take a while. She shifts her body so that her dripping vagina is over your face. You eagerly set to work.

You like to think you’re pretty good at what you do. Isabelle apparently agrees, as it is not too long before her body is bucking and gyrating on your face. She continues sucking you off, becoming less methodical and more eager.

You slide a finger into Izzi, reveling in the girl’s tightness. Not that you would trade, but this is like fucking Lisa before she had kids. Izzi moves with your hand, somehow managing to keep her mouth on your shaft. In a moment of clarity, you realize you do have some control. You remove your finger from Izzi’s soaking cunt and slide it in her anus.

“OH!” Izzi gasps, but her body betrays her. She orgasms onto your face. The combination of the motions is too much for you, and you spurt onto Izzi’s face. The poor girl tries to focus on your dick, but her concentration is taken by her orgasm. Thus, some of your jizz ends up on her face, some in her hair, but most on your sheets.

Izzi laughs gently. She gets up to clean herself up in the bathroom. You follow her to do the same. When you get back into bed, you manage to find all the wet spots. Izzi curls up against you, smiling up at you. “Just like Mom used to do, right, John?”

“Actually, gorgeous, your mom never let me near her ass. It was a real thing.”

Izzi smiles again and kisses you. “As it should be. We’re a new family now, we should have our own traditions.” She snuggles into you and is soon asleep.