Personally I think the happyness comes from innor heart not from outsider. If they can not feel happiness when they talk about your brother's marriage, then nothing may bring a happiness to them.
Forget about the money you put into the house. Let it be a past. You gave it to your perents who will decide how to deal with it, you did your part to your parents. That is it. Try not to compare.
My word might be too cold, hope you understand the consequence I talk about. Of course, offer your hand if your parentS want to come to you. We only can control the controlable. So be happy. Have a happy march break.
Forget about the money you put into the house. Let it be a past. You gave it to your perents who will decide how to deal with it, you did your part to your parents. That is it. Try not to compare.
My word might be too cold, hope you understand the consequence I talk about. Of course, offer your hand if your parentS want to come to you. We only can control the controlable. So be happy. Have a happy march break.