My number 2 was like just that. Hid debts from me until court summons started to drop on the mat.
I really never understood what she spent the money on.
When we split up she cleaned out what little money we had. At the time we had a 11 year old so I didn't fight her over the house.
Within a year the house had been sold, the money spent and she was living in rented accommodation.
The only thing she didn't get hold of was my company pension.
Life's a funny thing, you can go from loving someone to hating them.