saving my family

A few years ago after having our home sold out from under us by my mother in law, my family and I moved to another home that was rent to own. My sister had purchased a property for us and we made a rent to own agreement on it. Things were going great for a couple years, but then my husband took a different job where he was gone weekly. Things in our relationship went south after that. My husband started physically and mentally abusing me. Things got pretty bad. My 3 kids were taken from me because of it. This happened the same year COVID hit. My husband and I separated, I fell behind on my house payments, and my car became inoperable. After years of fighting and doing everything I needed to, I can finally get my kids back. Of course I'm now hit with another dilemma. My sister is now selling my house because I fell behind. Not only is she going to sell it for 3x what I owe on it she's keeping all the money. Even though it goes against everything we made an agreement on. I've put so much time, energy and money into this house because it was our home. Now I'm going to lose it too, and with it my family because I'll have no where for my kids to come home too. I don't know what to do anymore or where to turn for help or guidance. I feel lost and out of chances to have a great life with my kids who I miss like crazy everyday.

I'm trying to gather money any way I can to pay for my home and have my kids back where they belong..with me.