My wife and her friend went out to dinner last night. Her friend came over after work, they both got ready, then went to meet another group of friends. After they left, I noticed that her friend left a backpack in our living room. I don’t know what came over me, but I got so curious about what was in there. After an internal debate, the devil on my shoulder ended up winning, and I opened the backpack. Inside I found a bunch of random stuff, but in an inside pocket I found a lacy/see through little bralette and the tiniest matching lacy G string. As soon as I held up the panties, my dick got hard. Then a rush of guilt and shame flooded over me, I stuffed them back in the pocket, zipped everything up, and put the bag back where I found it. My wife and I have two kids, so I couldn’t tell you the last time I saw a pair of panties like that. I couldn’t get the thought out of my head. Are those the panties she wore to work? If so, I can’t imagine what she changed into to go out for the night. Or were those panties she planned to put on later after they got home and she went to her boyfriend’s house? If so, then he is a lucky lucky man. Either way, I jerked off twice to the thought of her in them. And now I still feel very guilty.