lesbian best friend?

Hi girls! So my husband has an old best friend who is a girl who I never had an issue with until I found photos of her in her underwear on my husbands phone when we were first dating!! I obviously went mad because just because she's gay doesn't mean she can send photos of her self like that to him. She text him every night saying love you and always posted on Facebook saying how much she found straight guys in relationships attractive but then had a go at me and said she's gay blah blah blah so I went crazy and me and the girl had a big argument. And she said some awful things and then me and my husband carried on with our relationship and she kind of just disappeared over time. When we had our first baby she was all over him again and then now we have just got married she's all over him again. The other thing is that when they start speaking my husband never wants sex but becomes really cuddly. Am I reading too much into this or what so confusing 😡🙈😭. UPDATE :She said she 100% gay and doesn't want to be with him in that big argument we had