Watching my girlfriend's every move through her used satin panties.

I spy on my girlfriend's every move, watching her in her satin panties. The sight of her ass in those tight, alluring panties drives me wild with desire, leading to a satisfying climax.

I've always had a thing for my girlfriend's panties, especially the satin ones. They're just so sexy, and they cling to her body in all the right places. I can't help but watch her every move, imagining what it would be like to be inside her, to feel her warmth against my skin. It's a fetish, I know, but it's one that I can't resist. Every time she wears her satin panties, I find myself getting hard just from watching her. It's a sight that never gets old, and I can't wait to see her in them again. But I can't let her know what I'm up to, or else she might stop wearing them altogether. So I just watch her from afar, enjoying the sight of her in her sexy panties. It's a naughty habit, but it's one that brings me so much pleasure.