Is this a red flag or a harmless joke?

My girlfriend told me "If I ever slept with a rockstar, I'd make sure he got me pregnant so I could take his money"

She was clearly joking and trying to be cheeky, but it just rubbed me the wrong way
Updates
+1 y
For a bit of context, we were talking about whether or not old rockstars could still sleep with a lot of women. It didn't come out of the blue
Is this a red flag or a harmless joke?
Post Opinion