Recently I was working away for a few weeks and to save a bit of money I lodged at a house with Pam, a woman in her 50s. Pam was divorced and her kids had grown up and moved away so a friend put me in touch to rent her spare room. I'm also in my 50s and divorced and don't get much sex these days. Pam was slightly plump, with blonde hair and not bad looking for her age. She told me she had a few male "friends" and that they sometimes stayed over. The first weekend I was there she went out for a drink and I stayed in to watch TV with a few beers. After I went to bed I heard her coming in about 2am, laughing and talking to a man. They went up to her bedroom and after a little while I could hear the bed creaking and muffled groans. They were having sex and the creaking got faster and ended abruptly with the sound of male grunting as he was spunking up her pussy. Shortly afterwards I heard him leaving. The next morning she was up and out shopping so I sneaked naked into her bedroom. The bed was still unmade and I noticed sperm stains on the sheets where her arse would have been. On the floor next to the bed I found what I was really after - her discarded panties. I picked up her white frilly knickers and felt the damp gusset. She had wet her panty crotch with her aroused cunt about to get a cock up inside it. I sniffed the stained gusset and the musky smell gave me hard on. I stepped into her dirty panties and pulled them up onto my arse balls. My dick was stiff and bulging, leaking a precum stain into the silky material. I lay back on her bed and wanked wearing her soiled knickers and filmed and took pics with my mobile phone for later . As I neared my climax I took her panties off and pressed my cock into the cunt stained gusset, flooding it with my spunk. I wiped my semen off the crotch which was already wet anyway. The following weekend Pam went out again but this time stayed out all night, presumably with her man friend. She came back in the morning and went into the shower before going to bed to sleep it off. When I went to the bathroom I looked in the laundry basket and, to my delight, there were the clothes she had just taken off - a white blouse, a black skirt, a black lacy bra and rolled up inside a pair of tights, her black frilly knickers. I inspected the gusset and it was heavily stained with semen. She had obviously had a cock up her hole not long before for a morning shag no doubt, and her lover had left a large deposit of sex cream. I put her dirty knickers on and I could feel the spunk stains on my balls and arse. My dick was stiff and poking above the panty waistband. I put on her tights, bra skirt and blouse. Again I filmed myself and took pics whilst wearing her slutty clothes. I took off her dirty panties and sniffed the sex stained crotch, finally dumping my load in the spunky gusset.