My sister blocked me over my boyfriend

My boyfriend has picked up a new "hobby". He has really bad cleaning OCD so he decided to use it to help people. He's recently started helping people who need their home cleaned for free. So people who are disabled, or have a hoarding problem, or are going through depression. He has a list of people. And he does super deep cleans. Some projects take him a few days. My sister reached out to ask if my boyfriend could clean one of her rent houses. The tenants left it a mess! I told her to text my boyfriend tthe details and my boyfriend said he wouldn't have time to get to it for months because he has other people's home to clean. My sister wanted to be bumped to the top because she's family. My boyfriend told me he's not because based on everything my sister told him the had to put down like a $2000 deposit. He told me it sounds like she just wants him to do it so she doesn't have to pay to have the house cleaned and to pocket some of their deposit or all of their. He's not moving her up. I said okay. I explained to my sister that he can't move her up and she got mad and blocked me! I can't force him to clean that apartment. I'm not sure what she wants from me