We were naked and having sex on my sofa, trying out doggystyle but the position we'd ended up in was awkward and uncomfortable and it wasn't doing it for me. I started to lose my erection so I pulled out and started slowly stroking myself to get hard again.
"Turn over," I said, wanting to see her body from the front, her small breasts and her face, softly smiling at me. She turned over, lying back, her legs spread wide as I knelt between them. Looking down at her naked body got me hard again.
"Touch yourself," I asked. Her hand moved between her legs and she slowly circled her cit with her fingers. Watching a woman pleasure herself is a huge turn-on for me and I masturbated more vigorously. I broke the condom I had on so I pulled it off. I thought about getting another one so we could fuck again but watching her masturbating was really hot and I was so close to orgasm, panting and moaning excitedly, that I didn't want to stop.
Feeling myself about to cum I knelt upright and leaned forwards a bit, so that when my intense orgasm hit, my cum splattered messily over her belly.
Later on, I confessed that cumming on her was one of my fantasies that I'd wanted to try, but that afterwards I'd felt a bit guilty for making such a mess. She said that sex is often more exciting when it felt a bit naughty, and I had to agree. She let me cum on her several more times after that, and I enjoyed each time.