Kids today have to put a name to everything or else they're not happy. When you name something you degrade it, make it worthless, make it dirty. So shame for your wanting us to make it.
When a guy gives money, buys stuff and helps support a woman he's probably just looking for (and is getting) sex in return. He's probably been married and felt tied down, bored, so wants to satisfy himself and while a woman gives out he's happy to return the favor. It's kind of convenient prostitution. Maybe some day she will turn him in, but she'd be involved too so for now she keeps quiet. Maybe it's called "friends with benefits"