So my best friend (we'll call him Bill) and his three-year-girlfriend (we'll call her Jill) come over Saturday night for some drinks. They live about 45 minutes away. They're both in our wedding as Best Man and Maid of Honor (we'll call my fiancee Sally). My brother and his wife were also visiting.
Around 11 PM, we're all down in the family room (basement level) playing games and Bill and Jill go upstairs. They don't come down for a bit until finally Bill calls down to Sally and I to come up. When we do, he's in the kitchen kind of teary eyed, and Jill isn't there. He says, "Alright, we had an argument and it's pretty much over." So I sat there talking to him for a few hours and Sally went upstairs to talk to Jill. They both stayed over in separate guest rooms.
The next morning, I had to work at noon. I go down to the family room where Bill is sleeping on the pull-out and say I'm heading to work. He says he's gonna get up and shower and then leave. Sally is going to drive Jill back home because it would be weird for Bill to take her home that day.
As I'm leaving work (around 7pm), Bill texts me and asks if he can come hang out that night. I say that's fine. I also get a text from Sally saying "Have I got a story for you." When I get home, she tells me that she returned from driving Jill home to find Bill still in bed in the family room. She had texted him an hour earlier to see if he had any trouble when he left locking up and setting the alarm. He said, "I haven't left. I've been in bed all day."
So, she gets him a tea and brings it downstairs. It's almost pitch black because it's the family room and the window doesn't let in much light, and as she turns on the light she catches a glimpse of Bill's penis hanging out of the covers a bit. She tries to ignore it and talk to him, and she goes back upstairs. He then gets up, showers, and leaves.
After she tells me all of this when I got home, I kind of laughed it off and said, "That must have been fucking weird, but I really don't think it was intentional. Why didn't you tell him to cover up?" Sally said she felt awkward and it was out of line. But, now Bill is coming back up that night. He gets there shortly after (8:30PM).
I am in the living room now fixing Sally's mother's laptop that she brought with her when she returned from bringing Jill home. She is in the basement with Bill (It's usually where we hang out with friends, home theatre setup, consoles, etc.) She calls for me to join them in a playful way she usually does when she thinks I'm ignoring her/whoever. Like, "Heeeeey, come down here! What are you doooing?" I call down that I'll be down in a minute. She comes up and tells me she is very uncomfortable and she wants me to come down right away. I do.
Shortly after, she went upstairs to do some marking and what not before going to bed, so we didn't see her for the rest of the night. The next day, after Bill leaves, she tells me that she saw his penis hanging out of his shorts again
and that's why she was calling me to come down. Fast forward to today (Tuesday evening) and she's even more upset with me, now 100% convinced that he was trying to seduce her by having his dick hanging out when I wasn't in the room (or even home the first time). She thinks he stayed later on Sunday because he wanted to do this. She thinks he wore shorts Sunday night when he came back in order to do this.
He also texted her messages about how he had pictures of himself on his phone he was going to send to Jill but never did, and it's a "good thing noone found his phone that night." Sally is convinced he was suggesting he send the pictures to Sally, instead.
She also said that he had his toiletries bag in the washroom with his iPhone leaning up against the back of the counter, and she thinks that Bill was trying to secretly video tape her when she went to the bathroom.
Now, I don't know what the fuck I'm supposed to do here. Sally is 100% convinced he intentionally showed his penis on both occasions. She is absolutely furious at me because she thinks I'm not taking her seriously and I should be doing something about this. She says Bill is no longer welcome here, and she wants nothing to do with him ever again (or me at the moment.)
Am I crazy here, or does this all make no sense at all? Why would my best friend of 14 years suddenly decide to show his penis to my fiancee? He has absolutely no history of this kind of behaviour. I don't doubt it was a very uncomfortable experience for her, and I've said as much, but I just don't think it was some plot to show his dick to her. My main point is, Bill's character aside, what would be the motive for a guy to do this? To his best friend's fiancee? He's not a stupid guy, so he knows how hitting on her would go down, and I know he never would, so why would he show off his dick?
So, I have talked to Bill about this. I basically told him about what Sally saw and how she is very upset and how she suspects it was intentional. He says he is extremely embarrassed and had no idea he was in a revealing position and assures me it wasn't intentional. He says he stayed late Sunday before leaving because he was paranoid about not setting our alarm properly (we had a break-in a while back). He said he sent the texts about the pictures because he was talking about how weird it is to be single after three years.
I don't know what to do here.