” --- I went into the bathroom and quickly got undressed, stripping naked before putting on the panties and bra. I assumed they belonged to Jessica,...but I didn’t want to ask. For now, I just wanted to go with the flow. Zak had impressed me with his stories and equally with his ability to make me feel comfortable with the situation, despite my confused state of mind. I looked at the bulge in the panties, feeling excited at the sight of my shaft pressing hard against the soft material. I slipped. "So, what do you think? Should I buy the damn jeans?" Oh yes, definitely. They fit you like a... I mean, they show off your figure to perfection." You admire a classically voluptuous woman, do you? That being the case, I'm pleased to meet you. I'm Fiona."She paid for the jeans, and we agreed to continue our discussion in a more congenial setting. For example, over dinner."Best meal I've had in ages." Well, not actually the best, but at least as good as I'd gotten in the fast food joints where. How was I to know that the door I opened was his daughter’s bedroom!As I opened the door I heard a faint groaning noise; so I realized this wasn’t the study; but it was! The sight before me was of my brother’s 17 year old daughter Carrine and her brother Kyle, who was fucking her from behind whilst she watched the laptop which was showing a porno film! … “Hello, Uncle James!”, she spoke softly, sorry you saw this but I just needed a fuck and my brother was handy. “You horny pair!!” I said …. I'd waited too long, and to know he felt the same...my gosh if it didn't make me want to agree to do every little dirty thing he could think of.And the pair of chocolate orbs boring holes into my soul expressed that he could indeed think of many dirty things.I turned to take in my surroundings, to check if anyone had noticed us. No one had. At least no one I could see, and that worked fine for me. I could delude myself into thinking nobody saw us and just leave it at that. Before my courage.