I'm so pissed off right now. My mil and her shitty boyfriend are staying with us again. I hate it…

I'm so pissed off right now. My mil and her shitty boyfriend are staying with us again. I hate it but they owe us almost 2000 dallors for us getting my mils boyfriend cdl back. They have no where to go other than with us. My mil doesn't help with dishes she never cooks dinner. I have been cooking and cleaning up after dinner for almost a week now and I'm getting pissed. I'm 35 weeks and 1day today. I'm 3 cm and I've been hurting for about a week. So when I do feel like cleaning I don't want to do to much. I no I need to say something but I'm not that kind of person. I just can't wait for them to be gone in their own place