Am I crazy?

Let me set the scene for you. I grew up alongside a girl that lost her father at five. Our fathers were very good friends so our families created a tradition. Every year growing up we had dinner with this family around Christmas time. I went to Catholic school with the girl. We were close on and off throughout life. She was always just a good hometown friend to me. So this year she reaches out and wants to have a Friendsgiving while she’s in town. She vouches for her boyfriend of two years and brings her dog. My spouse and I welcome this couple into our home. My daughter is always thrilled to meet friends of mine from before she was born so she takes to the girl immediately. All is well we’re all having fun getting along. We’re cooking, having margaritas, they planned to sleepover so they wouldn’t have to drive. I’m at the stove with my spouse getting ready to plate up dinner when suddenly, I’m told there’s a problem with my daughter. She is saying that the boyfriend is a bad stinky man and she wants him to leave. I have never seen her react this way to anyone in her short life. She’s known as the kid that brings light and joy everywhere she goes. This behavior is highly irregular. The boyfriend vanished into thin air. I took my daughter for her bath and the girls stayed behind trying to explain what happened to me. I have to note that she is a very difficult person to extract a solid statement from. I kept my cool and grilled her because it had become apparent that something the boyfriend did provoked a traumatic reaction from my daughter. My spouse and I were very confused because we were standing in the same room when the tonal shift happened. Their story is that he farted, and it scared her and he felt so bad he had to Uber out of here right away. I don’t buy that for one second. My daughter thinks gross things are hilarious. If one of our pets has an accident she has to get up close and see it. She’s not the kind of girl that spooks at a fart. I really couldn’t get much out of my “friend” she just kept repeating how much her family and brothers children love the boyfriend. She didn’t see anything yet she maintained the fart story. She did slip up and agree with me that based on the evidence clearly something inappropriate happened, but she didn’t see anything of course even though she was right there. They don’t live together she didn’t know. She has to run and catch an Uber Bc she can’t send him back alone with her niece and nephew. She said that to my face. They flew out of here like they’d robbed a bank. Innocent people don’t flee a crime scene. It was bizarre. I should’ve had my phone recording in my back pocket while I was grilling her I know. My daughter always fights bathtime and when in the tub she will physically do everything she can to get away from the washcloth. Sometimes I have to bribe her with gummies to make bathtime happen. This bath was the opposite. She wanted her bath right away and she wanted me to wash her she said the boyfriend made her feel dirty. Emotionally she was in a state I’ve never seen. At least not on her the behavior was consistent with someone that had been assaulted. I recognized the look in her eyes, on her face. Something she didn’t want to happen happened to her. When my spouse and I gently questioned our daughter, all she would tell us is that the bad stinky man touched her and it made her uncomfortable. When we ask where she screamed at us on the arm! When we asked her to show us, she just poked my upper arm. Basically, no one‘s talking. The bottom floor of our house has an open floor plan so she was never alone with these people and we always put pants or shorts on her. Her clothes were undisturbed so I guess I’m meant to be grateful. My daughter just wants to forget for now and I support that. We’ve had the talks with her long before this she knows what is appropriate and what isn’t. She’s pretty much returned to her normal self in the aftermath but the mask slips. I told her her favorite auntie was coming into town, and she had to be sure it was just her and not the bad stinky man. She loves it when we have company. new people never freak her out. I’ve made the rounds discreetly and done my best to alert the girls brother. She and the boyfriend were staying with him, he’s a high-powered attorney with a wife and kids. I texted and asked him to call me when he had a chance told him we needed to speak parent to parent. He said he would but the call never came. I texted him and told him I didn’t want to disrupt his life or family in anyway and to just keep an eye on his kids with his sister in town. He responded with a quick thank you so I’m pretty sure he’s already had this kind of trouble in his home. One of the first things the girl said when she got into our house was how relaxed she felt bc Her brothers house has so many rules. I asked my mother to reach out to her mother (they’re good friends) to ask if she’d ever gotten a bad vibe off the boyfriend but that was a no go. I’ve basically been told to turn a blind eye and sweep this incident under the rug. My spouse and I are devastated there’s nothing further we can do at this time. Our daughter isn’t ready to talk so we’ve just been giving her extra love and proceeding like all is normal. But it’s not. I know this man harmed my daughter. I can’t prove it and even if I could pursue him legally it wouldn’t do my child any good. The other family has closed ranks and I can’t really blame them. If I was making the kind of money the brother is I wouldn’t want a scandal either. Obviously I’ve blocked the girl and banned her from our lives, and my property. She left in such a hurry she left her purse behind and had to come get her car the next day. Her mother was driving her she wanted to come in and say hi. I told her the purse and keys were in the car and to never come near us ever again. She said she was sorry we felt that way and that everyone in her family loves the boyfriend. I feel like I’ve been taking crazy pills. If you’ve had a similar experience, please share how you dealt with it. I’m really struggling to make peace with myself for allowing this couple into my home. There were no red flags, the girl has never been in trouble with the law or done anything to set off alarm bells. We’re in shock this happened with both parents in the room and honestly questioning our sanity. I don’t care about payback or revenge. I just want my little girl to be OK. She seems to be, but it’s really too early to tell.