My fwb is a dirty bitch [MF]

I work with this girl who is on the nerdy side and doesn’t get much attention from guys. But underneath that nerdy exterior is a pretty hot body and a very dirty mind. We’ve been casually fooling around for the last year or so. She says she is usually the dominant one with guys but with me she becomes really submissive. She came over the other night and handed me a marker. She wanted me to take some pictures with dirty things written on her. I started by writing “Dirty Bitch”, my pet name for her, across her cleavage. I took some nice cleavage shots and then some with my cock over her tits. Then she started sucking me so I took the marker and wrote “I ♡ sucking dick” on the palm of her hand. I got some nice shots with her mouth full of dick, showing her palm to the camera. I then flipped her over and pulled her pants off. I wrote “spank me” on one cheek and “I’m a bad girl” on the other. I gave her a couple good hard spanks, leaving red handprints and got more pictures. She was very impressed with the ass shots I got! Next I had her lay down on her back and wrote “Fuck Me” right above her shaved pussy. I took a few pics of my horny little bitch and then spread her legs and took a few more. Then I got a few closeup shots of that pussy just begging to be fucked. But I didn’t fuck her because I’m a tease and I make her wait and work for it. Instead I straddled her and got some nice pics of my dick resting on her face and between her tits. She continued sucking my cock and requested a pearl necklace. I shot my load on her chest, where I had written “Dirty Bitch” and of course took more pics. Then she went on her way and I sent her the pics so she could get herself off at home.