I would feel really pissed off and disrespected if i married someone for 15 years, and the whole time they were keeping their thoughts to themselves, changing their words to hide secrets, and opening up more to random people on the internet than to me.
what am i chopped liver? you can't trust me? why the hell did you even marry me then.
you know they have you say "the truth, the whole truth" when you take an oath, because contrary to what people on here might say, withholding the truth is a form of a lie
there is a big difference between not stating something from your past, and actively deleting internet history, hiding spending, and tucking away clothes or lieing about what you did when you two weren't together when she asks