Husband trouble/social media

So my husband and I have been together a long time. some issues and there have been times in our relationship when he feels unappreciated etc. we have a a child that has some different needs that has at times taken a toll on us. We even thought about calling it quits. I do love him and he told me he loves me and would do anything for me and wants to be with me. However, when we were working on things he deleted his social media. Well I looked at his phone and saw a message a girl he went to school with. He shared a picture of our two kids at Vegas . Mind you his profile pic is a picture of he and I. This woman replied to him and said she was going to going there and that she had bought some new bikinis and wanted to basically send him pictures of herself in them. She also shared a pic of her new tattoo around her chest area and told him it went a little higher ( like on boob area I guess) I was livid he says he doesn’t like her but that she does or has sent pictures and when I saw the message she actually offered it , but he’s never touched her or anything.he said I could even call her. He also said he felt I wasn’t doing anything for him. Said he’s in love with me and he doesn’t care about her. He did delete the account before I snooped. Not that that was right either but I’m kind of confused now. I want to work things out but I’m hurt by this lack of respect and also I’m wondering why a woman would agree to do this .

Do women do this for attention or does anyone think she wants my husband ?

I’m just still confused about it all he keeps saying he fucked up but didn’t sleep with her or anything and doesn’t care about her but I don’t know what to do.