Last week I was visiting my female friend. She's blonde, has green eyes and a very slim body, with small boobs. We get along great and sometimes she sort of likes to tease me, like she's dressing up sexy and poses and stuff. But now she had just emerged from the bathroom and smelled so fresh and she was wearing her ordinary slacker outfit, loose jogging pants and a tshirt..but no bra underneath, which made me quite aroused. So we were sitting by the kitchen table and she had prepared a sandwich with cottage cheese on and had taken a few bites when the phone rang. So she got up and rushed into her other room where the phone was. and i was so horny that I had to masturbate. I didn't know how long she would be on the phone but i heard her babbling away, giggling now and then, so i figured i would be safe. And I was stroking my cock until it was very hard and warm...at one point i thought she would come back and I freaked out a bit but then she started talking again. Soon i was about to come and i remembered the sandwich so I decided to shoot my cum on the half-eaten sandwich. When i was finished i could see the cum quite visibly close up, because its got slightly different colour and shape than the cottage cheese. But even from where she was sitting it wasn't that obvious. So i let it be like that. After a little while I heard her finish her conversation and get back to the kitchen...she poured herself another cup of coffe and then sat down on her chair. She told me about the phone call and meanwhile she grabbed her sandwich, but without looking at it much, cos she was focused on me. And then she took a bite of it and as she was chewing i could see some of the cheese stuck on her upper lip. i was sitting close enough to her to make out the details and i swear i saw some cum on her lip as well because it is quite easy to tell the difference if only you know it's there. She licked her lip and then ate the rest of her sandwich. A few times she looked at it but never seemed to notice, cos she was too focused on our conversation.