NPR but I need some input. I just started a new job working with my husband because we can barely afford bills with just…

NPR but I need some input. I just started a new job working with my husband because we can barely afford bills with just him working. My only babysitter is my mom. We can't afford daycare or a nanny. But my my mom has gone off the deep end. She Keeps not showing up and making us late for work/ making me have to use my 17 year old sister to babysit even though she has school. My mom is apparently too sick and every time we talk it's always about how we don't care about her and are using her but she never goes to hospital and instead sleep all day and puts my sister and I down when we talk. The other day even she came to my house while my sister was watching my kids and tried taking them from her and wouldn't even let my sister leave with them. Today topped it off when she picked me up from work(she is also my only ride as I have no license) and she was drunk and was drinking and driving with my kids in the car. I want to quit my job because I don't feel safe leaving my babies with her and I have no one else. But my husband won't let me quit because if I do we are apparently screwed. I feel so stuck. What do I do? What would you do in this situation. I want them safe but also don't want to fight with my husband and have him yelling at me and resenting me. So sorry for the long post.