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The original was posted on /r/AmItheAsshole by /u/Throwaway35641 on 2023-09-20 23:03:05.

My (15M) mom died 6 months ago, pretty much straight after my dad took down all the pictures she was in. A month ago I met my dad's new girlfriend and her 8 year old son, they moved in a week after I met them and they're already talking about getting married early next year.

I've not tried to form a relationship with them and I've been pretty much ignoring them since they've been here, I'm not interested in having a new mom or brother, which is what my dad wants. It just feels like she's replacing my mom, there's literally no signs of my mom ever living in my house It pisses me off so much.

His gf complained about me to my dad after I refused to take her kid to the park. He screamed at me and we had a big argument. He said I'm not respecting his relationship and I need to move on from my mom and accept his gf and her kid since they're part of the family now. I don't understand how he can move on from my mom so quickly. My dad grounded me until I can "learn to respect him and our family"

Am I the asshole? should I have made more of an effort with his girlfriend and her son?