Thoughts on if I am BU please 
DP of 8 years has 2DC. We have lived together in my house for 6 years. I am the sole owner since my own divorce 10 years ago.
One DC is college age and one high school age.
I have kept this property as it is large enough for my own DC and also DP DCs to have a bedroom each when they are with DP - 60/40 arrangement, otherwise I think I would have downsized many years ago.
My issue is DPs financial arrangement with his EXW.
He has paid the required maintenance since they separated 9 years ago (no CSA involvement) PLUS half the mortgage on their marital home in which EXW and their children still reside. He is still on the mortgage.
DP says it was initially agreed that when things were settled EXW would seek a mortgage for the property in her sole name and keep any equity in the property as hers alone.
She in turn would leave DPs pension alone.
There is very little difference in these 2 amounts so no one is either gaining or loosing.
In all these years no movement has been made by EXW to remortgage until she was nudged slightly earlier this year by DP.
She now says her income won't get her a mortgage to cover the amount needed.
For context EXW works P/T, term time only and claims a decent amount of Tax credits plus maintenance from DP. She is bringing in more a month than DP.
She is also double degree educated so doesn't necessarily have to be in a min wage role or work only term-time now the DC are older.
This is what she chooses to do rather than having no options.
I feel that with the help of a broker there will be a mortgage that is available to her, I know the figures and it is definitely doable.
In the meantime, we are unable to buy somewhere together as he still has a mortgage with EXW and I am paying for us to live in a relatively large house with its own large mortgage as DP is still paying towards his EXW home.
AIBU to think that, by now EXW should be at least trying to stand on her own two feet and DP should be in a position after all this time to move on?