How much money are we talking about?

Cousin didn't have any cash left for dinner so i paid $5.

I don't find it worth it to hunt her down for $5 b/c i'm sure she'll get me back later one way or another.

If we're talking like $20+ though that's a different story. $20 is my threshold for being a bill collector. I just remember things. If I don't remember, then you don't owe me anymore.