Me and my wife (Harley_Quinn) do the same thing. I just make sure she doesn't do anything stupid and get me banned and vice versa. I informed administration first though before she joined, and haven't had any issues. We even send cash back and forth ( maybe $1k at the most, going each way) for various RP, or gas/repairs. As long as you aren't creating a new account to "farm" money or break any rules, you should be fine.