If you don't mind sharing. I have a feeling that both your bro and sis in law don't have a decent job and little salary hence need to move into your 99 place and that when they got married your husband must have helped them financially too
Your sis in laws doesn't work but thinks day and night of ways to kiss your 99's ass so that she will hammer your c6 for $$ and help
Don't dream that they will ever be your family again la. They will only be locusts and eat up all your food use up all your money and think it it 老馮