My family (parents) own two properties. One was bought, the other was inherited and is situated in countryside. Its occupied 50% of the time by my dad. Its a very nice, private, renovated house.
My brother went to live in the inherited property over 10 years ago. His confidence/mental health wasn't great, and he was financially supported by my parents.
5 years ago he met a woman and they hit it off. During the times that my dad was not residing in the property, he would have her stay over.
They went on to build their own property about 2/3 years ago. He invested over 50,000 but we later found out that it was her name on the deeds, bills and mortgage. As you can see, my brother is not v assertive. Their house is about 10 mins away from the 'inherited' home and is also a beautiful home.
For the past year, whenever my dad vacates the 'inherited house', they both move back in like the old days. I find it so strange as they have their own place and it's making me resentful as it's our family home. I spend 2-3 months there every year.
My dad is useless and doesn't want to say anything. He is cowardly and wants2b everyone's best friend.
I'm feeling really angry with my dad, brother and his partner. I know it's not my property but this situation is taking my peace away. I am single and don't own any property myself. I couldn't care less if my brother lived there forever, but when you bring an inlaw into the equation, feelings change.
How can I cope with this horrible situation.