My son is accused of exposing himself

Hi everyone...first time posting here, just looking for a reality check and/or advice.About a year ago, my son was invited to a sleepover birthday party for a little girl he was friends with at school. She was turning 8, he was still 7 at the time, to give you an idea of the ages we’re dealing with. I didn’t think much of it, they were only 7/8 at the time, and would be supervised. I didn’t realize until I went to pick him up the next morning that he was the only boy who was sleeping over, but honestly I didn’t really have much concern over it, although in hindsight it was obviously a mistake. He said he had fun, and that was that. This was a year ago.Last night I get a call from the girl’s father, who I have never met before (he and the little girl’s mother are divorced, and the mother was the only one who I had met previously.). He was very polite and civil, but he said he had something serious to discuss with me. Apparently he was recently looking through his daughter’s diary, and she had written something in it about my son that confused him. On further questioning, she told her father that at the party, late at night after everyone else was asleep, my son had whispered her name, and when she looked over, he pulled down his pajama bottoms and showed her his penis. She said she just looked away, and that’s the story.I of course am taking this seriously. I sat my son down and asked him for his side of the story. He was baffled as to what I was talking about, and when I explained further, flatly denied it had ever happened. He’s not a good liar, seeing as he’s only eight, and I really want to believe him. BUT...I’m conflicted because this sounds like something he might do, kind of, thinking it was funny. Meaning he’s the kind of little boy who thinks farts and burps are the height of hilarity, and that his penis flopping around is the funniest thing ever, and has no modesty when he’s at home. I’ve had talks with him about how that kind of thing might be somewhat acceptable at home occasionally, but that he should never, never do anything like that in public or in front or friends or anyone who isn’t his immediate family. He’s never done anything like that that I’m aware of, and I know he would be embarrassed for his peers, especially girls, to see him naked.So here we are. She’s accusing him, he denies it. It was a year ago. He was 7. I’m supposed to reach back out to the father and let him know what my son had to say. I kind of got the sense he wasn’t sure his daughter was being entirely truthful, but that may be just wishful thinking on my part.My son and this girl remained friends after the party for the rest of the school year last year. My son says they’re not so much friends anymore, but that it’s just because they never see each other being in different classes. Also, my son has never had any kind of behavioral problems before. He’s an excellent student...his teachers have always loved him, and he’s very popular with the other kids. He’s always been just a sweetheart and a total goofball who takes pride in being a good kid.Sorry if this is rambling, but I’m so upset and my thoughts are all over the place. Did he do it, or didn’t he? If he did, how bad is this? Is just an innocent childhood foible, or is it a sign of something more disturbing? And if he didn’t do it, and her parents won’t take that for an answer, what happens next? Could they sue or something? Am I blowing this way out of proportion? Are we talking criminal stuff here?My son’s father is coming over this evening (we’re divorced as well) so we can sit down with him to discuss it further, and to impress upon him the seriousness of the situation and how, even if he’s innocent in this case, he needs to be aware of his behavior and the effect it has on others, etc, I still haven’t responded to the little girl’s father, partly out of the fear of saying the wrong thing and partly because I wanted to get some outside, impartial advice first.So, fellow parents, what are your thoughts? Ever faced a situation like this before?Tldr: a little girl is accusing my son of showing her his penis, he denies it. How do I handle this? via /r/Parenting https://ift.tt/2NnFeuZ