Her anus

As she continues to grind her panty-covered crotch against your face, you begin to aggressively massage her ass, kneading the firm cotton-covered flesh in wider and then tighter circles. She begins panting harder, and you slowly move your stiffened fingers closer toward the center of her ass with each pass.

Sam has never been openly interested in any sort of anal play, yet in the past you've had some indication that at least a part of her was perhaps a little curious. She's never commented on your "accidental" brushes against her asshole, whether with your fingers or your penis, and one night not long ago, while spooning, she seemed to be intentionally rubbing her crack against your dick while pulling one ass cheek open a little...but just for a moment.

You've been wanting to get your meat in her ass for some time, now, but so far have been worried that talking about it openly would gross her out. Tonight, though, you feel less inhibited than usual, and as you change from kneading circles to massaging up and down either side of her asshole, you decide to see how far you can push things.

Pulling your face back from her crotch for a moment, you slide her underwear down to her ankles. You breath deeply of the heady aroma that greets you as your beautiful wife stands before your worshiping form, her cute little bush now leaning forward to tickle your nose.

"Oh, Paul," she says, "Suck me now!"

Needing no further invitation, you quickly pop your index and middle fingers into your mouth and out again, and then you dive into Sam's bush with pursed lips and curled toungue.

"Oh, YES!" she screams.

That's when you gently push your wet pointer finger inter her ass until it rests firmly against the tight sphincter within.