Answer with your mouth...

Yes, you certainly do like what you see...but you don't answer yet...
She notices this, and bends a little bit more, bringing her ass, and pussy, even closer to your face, waiting for an answer...and you give her one...
Without warning, you bring up both your hands and violently grab hold of her large derriere, and at the same time, jam your face into her ass, expertly finding her asshole with your tongue on the first try...
"Oh fuck, you dirty bastard! Oh yeah, lick my asshole you nasty sonofabitch! Oh yeah, mmmmmmmmmmm..." she yells, gasping as she finds the closest wall for support, bracing herself so she can enjoy the ride...
Once I know she likes it, I grab hold of her cheeks even harder, and bury my face in between them, probing her asshole as deeply as I can with my flexible tongue, moaning my enjoyment.
"Oh yeah, baby, you like tonguing my asshole? You like licking my ass? Oh fuck that feels good..."
I was loving this...squeezing her ass cheeks as I moved my tongue back and forth in a steady rhythm, moaning the whole time...
"Oh shit, baby, that feels good...oh yeah, keep it up, I think I'm gonna cum, oh shit" she yells...this just spurred me on ever more...
I pushed my tongue deeper inside her asshole, and while she was gasping at the sensation, I removed my right hand from her ass cheek and snuck it in between her legs, finding her swollen clit with my thumb.
"OH FUCK yeah" she gasps "Oh yeah, oh god yeah baby, I'm gonna cum! Oh shit!"
she yells, and then her body shudders around you in orgasm. Her body shakes for several seconds, as she moans unintelligibly, before her breathing slows, and she comes back down to earth...
"Wow, that was amazing baby" she said, as I stopped tonguing her delicious asshole.