What to do about [M]y sexual fantasy and wife’s insecurities

I don’t know what to do. Me [M20] and my best friend [M20] have been friends for 8 years now. We’ve done everything together. Lately he has been really depressed because he broke up with his girlfriend a while ago and hasn’t had anyone to talk to. For the past weeks I have been getting this fantasy dream of helping him. I keep thinking about my wife helping him if you know what I mean. I imagine it in my head. She sucks his dick and let’s him bust in her mouth. Just the other day when me and her were having sex I thought about using her after him. I have never had these thoughts before but I don’t regret them. Currently we live 10 hours away from him and she doesn’t work so I wouldn’t mind her driving to him because that’s her home town. They could meet up at a hotel or something. This isn’t like cuckold or whatever. More like sharing her with him. I have brought up the thought of me sharing her before because I believe I don’t complete her sexual needs since I work late and stressed a lot I hardly ever feel horny. I told my friend that if he wants help I can get someone to help him not knowing that I was talking about my wife. I haven’t told her about my fantasy about this yet I don’t know how to. Should I tell her now or tell my best friend? It would make me happy knowing he likes using her just as much as me and she likes it too. My wife is very closed minded. I brought up threesomes before and she said no because “i am only hers”. She’s very insecure as well. How can I help her with that. She thinks every girl looks better than her and I have to reassure her all the time. If this fantasy does happen I will be very happy. If you have any input please comment for I need help. Thanks for reading my first post and I enjoy reading everyone’s stories. I’ll be happy to answer any questions