J.O.
Hello, I know you have a lot of advice already and for the most part mine will be the same, I have a sorda similar situation, My mom and mother-in-law don't get along, they both feel they have rights to me, when I was 17 my mom got involved with the wrong people and drugs, needless to say I ended up out of the house and with nowhere to go my then future mother-in-law took me in, my mom gave her gaurdianship so I didn't end up in juvie as a runaway. Know there is this whole jeously(sp?) thing with my mom. My mom and I worked things out years ago, but I have always hated having them in the same room togather for fear one would get their feelings hurt, even avoided parties for the kids, and then one day I gave up, they are adults and it isn't my job to make sure things are O.K with them, I quit running interferance and enjoy the situation, and I won't listen to thier "hurt feelings" afterwards. Believe it or not after a few times they stopped, things still aren't great but at least know I am not responsible for their feelings I have a family of my own they are welcome to participate but I will not worry about what they don't/won't do. I do try to always make them feel welcome, loved and appriciated, I just won't hold their hands.
Don't know if it helped.....But I feel better :).