Sounds like a good day. And a $200 bonus. I hope you get a chance to treat yourself.
The legalities of getting someone else's credit rating are complicated as are the rules for splitting debts in the event of a separation or divorce depending on jurisdiction. If you do have any concerns, especially if you suspect that he is tapping into joint funds or betting against the house, it may be worth a hour of a lawyer's time. I think you once mentioned that you do the finances so you will probably have a good grasp of what is going on.