I Am Going Through a Separation Forum & Chat Board | Separation - The House

Hey everyone.
Apologies if this isn't the right place for this.  I'm new.
My wife wants to leave me.  Our 13th anniversary is on the 25th of this month.  Lucky.
So anyway, we have a house and my mum lives with us since my dad died.  It has an inlaw suite.
She actually owns 37% of the house.
We can't sell the house.  We refinanced too many times.  If we sell now we walk away with nothing, and that means my mum loses her 37%, and I can't let that happen as she's on a fixed income.
So I talked about it with my mum and she's going to help me with the mortgage once my wife moves out.  We'll keep the house.  My wife will leave and do whatever she needs to do.
And I'll be the 36 year old single guy living with his mother.
.....oh god this just keeps getting worse.......

Anyway,  my quesiton is....do we need to tell the bank?
With my mum's help the mortgage will be paid, and for the time being my wife is okay with her name being on the mortgage still, as she understands the situation.  She won't be paying anything on it, but her name will be on it until I we can afford to proceed with more permanent arrangements.

As far as the bank is concerned, it's me and my wife's incomes paying the mortgage.  Is that a problem?

The payments will be made, so i don't want to rock the boat unnecessarily for the time being.  Am I doing anything wrong in not telling them?