Well when she is already that nice of giving me her panties, it would be really mean to anticipate from her to fuck me since she already did me a favor with the panties. But if she wanted it of course.
I'd be licking, nibbling, & kissing on that all night, every inch of her, teasing, sensual massage, long foreplay, making us both more desperate to fuck. But I imagine, if I was already in this position with her naked before me, that she'd already have me locked away. So after licking her to an orgasm or two, I'd buckle on a strap-on over my chastity device & fuck her hard to another orgasm while her panties are draped over my face or stuffed in my mouth. Only when she is satisfied will she tell me to put her panties on. Yes, I think she's tired of vanilla sex.