Thanks for the posts and input. I think that it is a good point that they may be taking their anger on my dad out on me. Luckily my meds have been stabilized and I've been doing really well for about 9 months now.

So the "family" trip is coming up and I'm going to Texas to spend time with my mom who has been in and out of the hospital since November. My brother lives near her and has been taking care of her so I'm covering while he and his family are gone. I gave dates to my brother that worked with my custody schedule but said I could come for longer if necessary and he said he thought the shorter time period was fine. Then my mom asked why I wasn't staying longer and said that my brother didn't understand why and my sister also said a deragatory comment to me about being there mostly on the weekend. I ended up talking to my ex and asking him to take my son for a few days to stay longer, but I am so angry that they are talking behind my back! I'm so frustrated that they are taking my ex on the family vacations and they are talking behind my back too! I just feel that they are being so insensitive.