I woke up really horny yesterday when I was in bed with my girlfriend. She told me she wasn't in the mood for sex, but that shouldn't stop me if I wanted to jerk off.
I didn't need a better offer than that so I pulled down my shorts and started wanking. It only took a couple of minutes of her watching me for her to get horny herself and soon we were both lying on the bed masturbating with our thighs touching.
I eventually came all over her tits with a little help from her touching my arsehole, and I helped her get off by rubbing her clit when she was just about to cum. Tonight we're going to film each other masturbating, can't wait!