Dad relapsed

I’m not sure how to go about this, he relapsed today after being sober for over 2 years. He used to do cocaine & speed, not exactly sure what he took but he was high.

I’m not mad at him, I feel sad for him. I’m not sure what caused him to relapse or if it was just a moment of weakness because he handles money everyday & does get stressed over things. Lately he’s been stressing over our family’s vehicles & getting them fixed & making the money to do that.

My mom, she doesn’t understand addiction. She says she does but she acts out as if he is a terrible person. I understand the disappointment when you learn the person you love relapsed. She kicked him out. She got mad at him… my little brother is just wondering where my dad is. He’s 13 & they’re pretty close. I know my mom is hurting, I don’t know what to do. I’m 22. I’m the oldest, I feel like maybe I should talk to my mom but what would I even say? She’s been in therapy for my dads addictions but hasn’t been the last few months or year due to covid. She is not a very great communicator face to face, she’s a texter with us. I’m also debating on texting my dad & talking with him, seeing what is going on with him mentally since he isn’t home. His antidepressants are here & his other medication for sleep & anxiety.