Boyfriend,kids,lazy

Ok so here recently I moved in with my boyfriend which is cool af but we live at his parents house with his 8 year old son. Since I've moved in he's literally done nothing no Laundry, no cooking, not putting his kid to bed, or making his food (which I'm not complaining about putting him to bed or feeding him) and now since I've been doing so much around the house his mom is volunteering me to watch her friends kids while their up stairs getting drunk and expecting me to do all this stuff while everyone lays in bed all day. I don't know what to do I love my boyfriend and his son and his family but I feel like a slave 90% of the time and if I don't clean up the place it just puts me in a serious bad mood