Aging parent wants to be independent but has too much to handle on their own. Where do we go from here?

My mom is almost 77, she lives alone. She’s independent but we do help her with big things like mowing the lawn ect. I have helped her with household chores and but not on a regular basis because she is physically able to do her own housework. And I think she should do it. She still drives. She recently had a fall which resulted in a broken arm. No surgery required. She will have physical therapy. She stayed at my house for the first few weeks after the fall and I was miserable. I feel terrible for saying that but she sat around wanting to be waited on and stayed in her pajamas all day just on her phone mostly. It drove me insane. That much time together under the same roof was not good for our relationship. I can see clearly it would not work for her to ever move in we us. I have one sibling who used to live with her for about 5 years. Never paid rent or helped with ANYTHING around the house. We eventually had to evict him due to alcohol and drug abuse. He no longer speaks to me but acts like all is good with my mom. Whenever she needs something she calls me and my husband. She knows my brother will not do anything. She can be very demanding and impatient about us doing things for her. And I often feel like it’s expected and not appreciated. Sometimes she makes hurtful comments like “I don’t want to burden you more than I have to....” or when I caution her about not doing things that aren’t safe she lashes out saying “stop treating me like I don’t know what I’m doing!” I realize she’s struggling with feeling like she’s losing some independence or control. But I would think the negative comments should be directed at my brother and not me considering my husband and I are the only ones who help her. I struggle with not reacting to her comments, it’s hard because she REALLY pushes my buttons. I have started saying no to her sometimes when her wants are not convenient for my husband and I. I’ve tried convincing her to sell her home (it’s too big) and downsize to a small apartment with no less responsibilities and little or no maintenance. She won’t agree. So here we are....her living “independently” but becoming more “dependent “ on us as we go along. No sure where we go from here.