No, we each have our own accounts, but we both have access to them both... I have never felt the need to check out what's being paid for out of his account, since he usually pays the rent (or most of it) and I pay all the bills, insurance, cars, hydro etc. out of my account. He has the passwords to check my account online too, but he's never bothered because I'm on top of all they payments, there's never been a problem. I'm not sure where he got the money to pay for the tickets, but then again, I'm not following his accounts too close either. I don't bother to check his mastercard bills, even though I could. I don't feel the need to go through the details of his mail, and like I said, I think if he'd really wanted to hide this, he would have gotten rid of all the evidance, right?
You're right, what's done is done, it's been paid for, it's not like we now have to come up with an extra 600 dollars or whatever, but my dilemma is that this is driving me crazy! WHY didn't he just tell me?!
Also, any time we need to spend any kind of extra money, we always discuss it first. We're not destitute, but we don't have any extras at all. If he wants to go somewhere, he always asks me if I mind, or, if someone wants to go to the restaurant and have invited us or whatever. If spending 50 bucks at the restaurant would REALLY be a problem, I would tell him to go, and I would stay home, you know, but it's not really that bad.
600 dollars is a different story though.