My husbands friends Gf claimed my husband was cheating with her.

I am 34F married to 38M. We have 2 kids ages 13 and 11. This is going to be a weird one, I'm sorry, but I need some advice.
I met my husband when I was 18. He and I both liked to run and we met at a 5k fundraiser our town put on. They do it every year and have like booths and different things for entertainment and stuff. The entire race we were mostly racing each other and it was a lot of fun. After that we walked around together to see all of the booths. We got something to eat and spent a few hours talking. I don't think we've spent more than a few days apart since then.
We for the most part have a great relationship. I've never suspected him of anything. He has never done anything for me to suspect him of anything. Dude is pretty much an angel. He is the type of guy that doesn't ever lose his temper. He is sweet and kind and loving. He is also a fantastic father.
Anyway he works at a papermill. He's been there for several years. He has a friend there who is dating a lady we will call R (25ish F). R is a little too friendly towards my husband when they come over but my husband brushes her off. He is very oblivious to advances.
I got a txt message from R. She sent me a **** pic and claimed my husband was cheating with her. The problem is my husband has a bit of a crooked ****.... I know his D when I see it, I've been using it for a very long time. She clearly doesn't know that and it wasn't him. I mean you can claim angles change the look or whatever to make someone think it's someone else's d but the curve can't be covered easily. It wasn't even the right size or shade or anything. It was very obvious she's never seen my husband's d.
Obviously I texted my husband and sent him screenshots. I wanted him to know what was going on and I didn't really know how to handle the situation. My husband told his friend and his friend claimed family emergency and left for the day.
Well apparently his friends girlfriend claims I am making it up to break them up and it's a whole thing. His friend was really being an A hole over the phone towards both me and my husband and my husband got into it with him over that. My husband is on my side. He saw the screen shots and has seen the texts himself when he got home. He also knows I wouldn't make up something so weird.
Anyway his friend is wanting to come over and see the texts for himself. However he was being an a hole so I don't want anything else to do with this situation.
Husband thinks I should just show him the texts and then he can do whatever from there. My husband would be there and the guy would behave toward me. Husband also said he could show the guy his D ( in photo) if asked to prove it's not him.
I'm not sure though. This whole thing is super weird and I'm still mad about the way he spoke to me.
Tdlr- my husband's friends Gf texted me claiming to have slept with my husband but the picture isn't him. I texted it to my husband and he told his friend but the friend got mad at me. He wants to see the texts now but he was an A hole and I don't want anything else to do with this situation.
Edit- I'm not super comfortable with having a man who threatened me at my house but my husband and I agree with most of the comments, thanks everyone. He's just going to take my phone to work with him tomorrow and show his friend the messages and leave his phone with me so I will have a way to get in touch with people. I have nudes of him if he needs to prove it's not him in person.


Source.