Early on in my marriage my wife would pull this crap. One day I told her that I wasn’t a mind reader and that if she didn’t want to tell me what the problem was that I was going to go about my day and enjoy it, which I did. I followed up with her about 2 hours later and asked her if she was ready to tell me and she unloaded. I told her I’d work on the things that she had bottled up and said that a marriage can only work if we both communicate. She shouldn’t be afraid to come to me with what’s bugging her. Ever since then she’s been open and honest. Really helped our marriage improve and evolve. She’s a lot more mature now.
So when my wife says that she’s “fine” I take it at face value and we both move on because she knows that if she wants to vent she can. She also knows I won’t dig it out of her and why.
Cheers