Using Facebook to upset each other

my daughter and daughter-in-law are using facebook to upset each other. I've told my daughter to leave it alone. She thinks I'm not supporting her because I don't want to join in with her tirade against my d-i-l. My daughter is pregnant and is spending all the time crying about it. My d-i-l has said some nasty things about her. She's deleted my d-i-l from her friends but is still upset. My son is in the middle of it trying to keep his marriage together.

wow, how old are these people? ones married and the other pregnant! seems like you need to bang their heads together and tell them to grow up and act like adults! without knowing how they came to hate eachother so much its difficult to give good advise, but if i was you i would stand tall and strong next to your daughter as she is the one who needs you emotionally- and making it your problem too-your son is more likely to try resolve this, or your monster daughter in law needs to have a serious talking to because it sounds like this outsider is about to put alot of pressure on your little family. good luck to you and your daughter :)