Dealin with Trauma

I've recently been seeing a therapist for the past two months to help me with my depression and relationship. We were discussing my family life and I revealed to my therapist many things that family members have done in the past to me that made me very uncomfortable such as being raped by my cousin when I was 7( he was 15 at the time) and my uncle touching, hugging, kissing me on the neck and mouth, always complementing me on my body etc when I was young. I've also never told anyone this. My therapist began to help me talk about it and try to begin my healing process and though it was hard, I started to process what I went through. Thanksgiving is coming up as we all know, and my mom just told me that the same cousin who raped me is going to be coming over😓. I haven't seen him since what he did to me when I was 7 since he lives in another state. But all of a sudden he wants to spend the holiday with us. I don't know how to handle this and I'm actually pretty calm about him coming even though I feel like I should be freaking out. I'm worried that when he actually does come, that when I will freak out and cause a scene or worse try to self-harm. I feel so alone and idk what to do or how to handle it.