OMG, MK. That really got me. This is exactly the reason I am holding on to my marriage. I don't want my kids to go through crap like your D6 is going through. I remember those feelings when my parents split. It is just the worst thing. Yes, people talking is so damaging to their little self esteems.
I read somewhere that children inherently know that they are created from their mother and father. To them, they are both parents. When one parent becomes "bad" they automatically deduce that they too must be bad because they are from and a part of that parent. They can not separate themselves as an individual yet. Their world is so dependent on that of their parents.
How is D6 doing in therapy? It sounds like it's not just you she feels she has to be loyal to but also your mom and brother. I would talk to the therapist regarding damage control. You may want to consider asking that your family keep H convo off limits while D6 and other children are around. Then, as hard as it is, rebuild your H's image for your D6. Point out all the good things about him, how much he loves her, the time he spends with her, and the things she does with him. It's not to take your H off the hook. He's still being an idiot, but it's for your daughter's health.
So hard. Poor thing. I have to do the same. Every time I see anyone, they want to know what my A-hole husband is doing now. My kids are small, but they are growing. They don't need this stuff ingrained in their little heads.
The good news is, you caught on. You are looking this straight in the face instead of ignoring it. You will be there for your D6, and both of you will rise above it. IT is so wonderful that you were able to have some quality time with her. I'm sure that was so special to both of you and did so much to boost her spirits.
(((HUGS))) to you and both your little ones. Hell (((HUGS)) to your H too. (I guess I'm feeling generous)
Me29 H33 D9 months S2 S9(previous R) Sep 8-19-07 I file 11-5-07 H home (Retro) 2-15-08 "Today is the tomorrow of yesterday." -- S9