Dead bedroom guy

This is really more of a yes/no than an is it normal question.

Mid 30s girl, new to the area and normally go to work come home play games,read a book or flirt on line. Bored!

I have a neighbor much older couple 15 to 20 years. He's a pretty good guy in shape and not bad looking for 50+ she sweet but kind of laid back homebody with a grandma body.

Now the problem, they have a very dead bedroom life. She's just not interested and/or vanilla if and when she does get interested. Both have told me this and he's looking for some spice. He has offered to just watch me masturbate, or same room masturbate with him. He has stated absolutely no intercourse, but could progress if we are both interested in foreplay, touchy feely type stuff, even possible oral or toy play. He's agreed to help me with an onlyfans with toys and his body if I don't show his face. Can't get permission from his wife because she thinks they're to old to want sex or should be, and he shouldn't want to Cheat.

He offers a NSA relationship which I think I'm fine with. It could fulfill some of my needs as well as his.
Should I? why or why not?