Not sure if AIBU because I get defensive around money so please can I get your view. DP and I have mostly separate finances (we've been together 10 years and have 1 DC). We have a shared joint account that we both put money into for mortgage and living costs, school clubs etc. Everything else is separate.
I have the following bank accounts/debit cards in regular use:
Current account
Joint account
Additional current account for transactions abroad ie on holiday
Business account (I am self-employed)
Plus I have a credit card he made me take out years ago that I never use because I hate credit cards and would rather not use them. He knows this.
So this morning he presents me with an Amex card that he's taken out with my name on it which he wants me to use for all spending from now on so we can get free flights or something. His idea is I would just use it to buy things and then transfer him the money. My immediate reaction was hell no! In the end I agreed to use it for stuff that I would normally spend from the joint account but even that makes me feel uncomfortable. He'll be responsible for taking the money out of the joint account to pay off the credit card so I won't have to do anything but it feels like a loss of control to me. He thinks I'm being ridiculous.
For reference he is good with money and trustworthy so it's not that I suspect he's up to no good - it just feels like an overstep to me.
Would I be unreasonable to refuse to use this or am I making a mountain out of a molehill?