Emotional day, indeed! But rightly so, with all of the events happening. How great for you and the girls to have each other during such tough times! And for you and Andy to be supports for each other as well (more so you supporting Andy, of course).
I have a brother who's been a rather toxic presence in my adult life. I've distanced myself from him b/c of that, with the mindset of 'maybe' in the future, we'll heal things up, but it would take significant growth on his part, and greater tolerance on mine. I understand your stance with your mother.
I was wondering if the conversation were turning (from Andy's pt of view) to "life is too short" regarding you, he, and the girls, and the need to get on with it in a way that demands some flexibility to start.
When my sitch started, XW insulted me to the core with her demand for S6 to reside with her, and for me to only get 1 overnight/2 wks, and with 2 afternoon visits/wk. It was awful, but I was able to see it as just a starting point, and 10 mo later, we're at about 40-60% time in sharing. I encourage you to start somewhere with the DDs, Jo.
I've read somewhere that the biggest killer of love is pride. Lord knows I had plenty of false pride in my M that helped to get me where I am today. No matter where you and Andy end up, it would be a happier ending if your DDs got to receive more time with you.
I chuckled out loud thinking of your DDs dancing around your place in your nightgowns. Aren't kids great! So much for your restful, self-care filled weekend, tho. Hopefully, you can sneak some of that in, then get back to it during the week.