I've been so excited to spend time with my SIL and FIL... All was well until my SIL confided something to me. She said my MIL and FIL do not acknowldge me as their DIL. It's infuriating and so depressing because I thought they've welcomed me into the family already. They were nice to me and I showed nothing but kindness to them. It hurts even more because now I realize that it was all for show. After all the sacrifices and the things I've gone through for their son--this is what I get in return. Now my problem is they'll be here for the next 2 months. How can I make it through without snapping at them?