I do nice things for her all the time, some big, some small. She is really the best person who can answer a question like this, because her perception of what’s nice is the deciding factor. Here’s one from my point of view, randomly selected: I’m retired and she’s still working, so after decades of ironing clothes for me (I need to add that I am absolutely horrible at ironing, while it’s a snap for her), she asks me to iron hers sometimes. I always do it, and she likes that little extra that she doesn’t have to do herself.
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If it was a 2 legged cougar my wife would use my tracking dog to track her down and call out names like skank. Cheers and happy weekend!!