I HATE in laws

Biggest one that I can't wrap around my brain is how a grandma can push for something that will take away from grandkids ! Now we live with my mil fiancée he's a great man like a father to me and my SO his father passed away few weeks ago and lived in the down stairs basement apt my SO Foxed the whole place up new floors and everything and fixing his whole house as well ! It was brought up to us if we wanted to move down stairs we could being we have a 4 year old and my lil girl will be in a month ! Now my MIL is soooooo mad she wanted her 17 year old to have it so she can go down there too .... Now y would u want 4 ppl squeezed in a bedroom if they could have a full basement ? U wouldn't want ur grandkids to have space and not be in each other's space ? It's sad how she picks herself over her grandkids wen she has a HUGE. Room already with a bathroom in it y would she need to go down in the basement ?? 

Another one :: that 17 year old thinks she's my sons mother and over powers my rules I'm 21 I don't need a 17 year old telling me what to do with my child wen he's being bad and is in time out she walks in and goes come with auntie don't cry like r u kidding me my son just smacked , cursed , broke something ect and u feel like he shouldn't be in time out ??