Ok so DH dad passed away 2 years ago. He owned a flat which he purchased with my DH and his sister, DH never lived there but was quite young when he was put on the mortgage purely to help his dad out. The sister always has and still does live in the house. When the dad was alive he paid his mortgage ALONE. No help from the sister on the mortgage or one of the other now adult siblings who occupies a room rent free.
For background info there's 5 Adult siblings including my DH.
When his dad died as house was joint tenancy it passed straight to DH and his sister. Despite the fact that there is 5 Adult siblings all together because they all have their own lives and "are so broke" DH and his sister have been going half on the mortgage. The plan is to sell when market improves asap.
So as not to drip feed info. DH and I have 2 kids we want to have more but canr yet as we are too stretched for money and too stressed. We have struggled to pay our bills our mortgage plus half of mortgage on Dads old house which is now technically DH and his sister house. DH has never lived in house. Also for added info we won't be going on holiday this year as we can no longer afford it. DH has been doing overtime at work.
By the way the dad always spoke about wanting his kids to split the house if anything happened to him but no he didn't have a will and couldn't of really stipulated such anyway due to the way the house was set up a long time ago. (Joint tenancy)
Other than the sister DH is going halves on mortgage with there is also an adult brother living in the house unemployed and rent free. As he is "Just trying to get on feet"
There are also 2 other siblings who have kids of their own and like I said "So broke" and have never offered to help pay the mortgage in light of our situation.
Recently they have been talks of the house being sold and the fairest way to split the house. There's been mention of an equal spilt between them all. AIBU to suggest that an equal spilt is no longer applicable since only DH and his sister have been paying the mortgage?