I read a saying that stated, "If she says that it's fine, it really isn't." However, you know your wife best. Does she usually say what she means? If my wife gave me a free pass like that, I'd probably go but then spend the trip calling and checking up on things. That and wondering just what it was going to cost me later.
I say that but she would actually mean that I should go. This is the same lady who, on our honeymoon, caught a really bad virus and would not let me go back home. Instead, we spent a day at IOA (only day that she wasn't violently ill) riding rides. She even blacked out on the Hulk but got off the ride with a big smile.