Model Help Follow Up

Hello! I just posted models about my sister in law texting me. I realized shortly after maybe why I’m spinning out. I think she shouldn’t be asking me to use my phone to take photos, but she did. I can say no, but I’m uncomfortable with being honest that I don’t want her to use it, so I’m resentful with my thoughts with her asking in the first place. I think I’m also afraid of how she is going to think of me for saying no which is that I’m selfish. I know it’s really me, but I love some advice on my previous models and how to clean this up! Thanks!