Is my mom manipulating me?

For context - I'm disabled physically and fighting for social security so I live with my mom right now. my mom lost the house even though we were all still paying her rent the whole time. Now she's trying to get a new house but she can't get one on her own. She's trying to ask me to cosign on a loan but I don't trust her. I'm moving into my boyfriend's apartment temporarily until we can save up and afford a nicer place together. What should I say to her? I feel like she's trying to use me. Shouldn't she be asking her fiance to co-sign?