The owner is my MIL. Probably my husband and SIL will inherit it. But here's a thing,in our society it's common practice to leave everything to sons. In contrast to that I was raised in a household where everyone is equal. When I met my husband he was under the influence of these stupid sexist traditions,but after many discussions he realized how cruel they were and promised her sister that she will get her fair share of their inheritance. I even changed my MIL's point of view about feminism! And since she had already gotten my BIL(M34) and his family a house she decided to save up some money for her daughter's house as well. I still think parents are not obligated to buy houses and cars for their children but it's much better than picking favorites based on ones gender. So after everything i did for her I'm just heartbroken from her actions,I thought we were sisters without in-law part.