Am I asking for too much?

I live with my life partner and his daughter. She is almost 18. A constant battle we have been having is that I think she should do just one chore around the house to help out. Anything. Take out the trash. Wash the dishes. Sweep something. Anything. Just one chore a day to help the family out. I am 5 months pregnant and have a toddler who is very high energy. I am more than happy to clean almost everything around the house. I just feel like she should contribute just a little at least. This has been an ongoing argument between my life partner and I. He says she shouldn't have to do anything and is always sticking up for her. And tells me I am making excuses/ being lazy. What should I do /am I in the wrong

Am I asking for too much?
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