credit card to your lover?

Actually me and my "lover" (I usually call him my partner) share our credit cards and pin numbers. We trust each other as far as that goes, since we share all finances we are both suffering in some way if we betray the other. However, if we didn't live together and share everything, I don't think I would trust him.

I would trust her withe the pin number if she is my wife or i am so deep in love with her.