Long post-pregnant&issues with parents

Hi everyone! I am currently 23 weeks pregnant and have been going through a lot since finding out I was expecting-my husband lost his job due to covid on our 7 week ultrasound date - I lost my job July 20th due to telling my job I was having some medical issues and had a letter saying until further notice which they took as a resignation. We have been renting from my parents since getting married a year ago. We live upstairs they are downstairs and they have a house in Florida.

My relationship with them has always been up and down. Either they love me or completely devalue me if I disagree with them or stand up to them. My husband was never keen on moving in but felt it was financially the best option. We were told the house would be like ours and it would be even- which it has not ever since moving in. It seemed we moved past a recent argument and my mom wanted to host a baby shower for me and redo the floors upstairs and paint for the baby (she also said she would be here from now until baby’s born January 2021 and leave summer 2021 because “I could never leave my daughter after having a baby”).

Well out of the blue today, she says they are going to Florida for the month of November and leaving their dog with us the entire time (who cannot be left alone due to being destructive and neurotic)- I immediately said that it’s not gonna work and to bring him with them due to us not always being home and taking our personal dog with us to visit family-she completely flipped out and said we are selfish , she does everything for us, ect. I thought about it for 15 min and told her we would try to make it work-she wouldn’t accept that and said she will be leaving november, will visit for a few weeks when baby is born then leave again.

I am not sure how to handle this as our relationship is always up and down and I feel I can never say no, and things done out of “kindness” always have some sort of condition to them. Any advice would be greatly appreciated.