Let your cock lead the way

As you watch Christine getting pounded on the floor, her pregnant belly and swollen breasts bobbing back and forth, you're unable to resist any longer.

Your big plans for the evening forgotten, you kneel down on the carpet, letting your cock hang inches from your mother's mouth. Flushed with pleasure, she glances up at you, then licks her lips and opens them wide. Harder than you've ever been in your life, you slowly push inside, your fat member stretching her mouth into a perfect 'O.' Her eyes roll back as you and your father fill her up from both ends.

Oh right, your father...using your mother was one thing, but now you're having a threesome with both of your parents. Ordinarily such a situation would be awkward to say the LEAST, but you're having a hard time thinking of it that way as Christine's wet lips and nimble tongue send waves of pleasure through your body.

You're so absorbed in her passionate attentions that you've forgotten about your sister entirely; you're startled when she clears her throat and takes a step closer.

"Okay, I guess we're not going out for a bit...that's fine, but I'm bored! Any of you need a hand or a mouth or something?"