My husband has his name as a co-owner on the house deed which has his paternal aunt as a co-owner too. The aunt has legally adopted him when he was a child. Her intention even behind adopting him was to loot money from his parents and have a secure financial future for her and her four children.

Her four children are greedily eyeing the house and would go to any extent to have the whole house in their name. We are doubtful that she and her children would be up to something for sure to have the house in their name by hook or by crook.
On mortgage, its her name entirely.

Is there any way she could have the whole house in her name as she is legally his mother and paying the mortgage according to the papers( he pays half of the mortgage but there is no documented proof)

Is there any way that her will could affect the ownership of the house.

Pleas ehelp. We are really upset about this and can not afford to consult an attorney.

Ok, first why is the mortgage in just her name ?

Next she owns I will assume 1/2 of the house if just her name and his name is on the deed. So why is her name on the deed to start with.

And if his family has all this money why can't you afford an attorney?

If the aunt(mom) dies, her other children would end up owning shares in the house most likely and could end up forcing the sell of it

You seriously need an attorney

You don't say WHAT or who's house.

If his and the aunt's name are on the deed as tenants in common then her kids will only get her share. Why would she adopt him if he has parents? There seems to be a lot more here.

Review the deed. If the deed is listed as "owners in common" the aunt can make a decision as to who will inherit her portion of the house upon her death. The deed may state that the house transfers to the other owner. It is going to depend on the wording of the deed. See if you can find a real estate attorney who will allow you an initial visit at no cost. He'll be able to review the deed and tell you where you stand.