....
Heaven forbid that anyone happily married here ever faces a divorce in their future, but if it's acrimonious (and 99% are!), then the legal team representing your about-to-be 'other half' will have a field day! - Very much at your expense!
Personally, I advocate as much openness and honesty in a permanent relationship as humanly possible and as a two-way street.
Sorry to be so realistic!