Is he deflecting? Or gaslighting?

I am 20 with a one year old and pregnant. My siblings (ages ranging from 13-23) live at home, but I moved out a couple of months ago, my siblings spend a lot of time in their rooms. I think some of it is because of their ages, but I think another part is the drama - my parents have a toxic relationship, my dad is a narcissistic drunk and my mom is a pushover who is way too nice for her own good - they fight CONSTANTLY. He treats her like complete shit and definitely doesn’t deserve her.

Even tho I moved out, I still talk to my mom often because we are close. I’m talking at least text every day, FaceTime for hours at least 2 times a week, and we just visited twice this past week. She told me that she’s been struggling lately between coming to terms with the fact we are all growing up and having to have difficult conversations with my dad. I listened, gave her advice, and promised to spend more time with her.

I guess today they started fighting and in the middle, my mom ended up telling him how sad and lonely she feels lately, because he ended up texting me. Basically saying that we should be helping her more, how “we” “take advantage of her”, “dismissed her as a parent”, etc. (which honestly, the other “kids” and I don’t do those things, he does). He tried to text it to just me privately at first and I opened it but didn’t say anything - I haven’t even come close to any of the things he tried to list. My mom and I have been close for all my teen years, so I have no idea what he’s talking about.

I feel like he’s trying to deflect or gaslight me into feeling guilty for the things he’s doing to her.