<human>: Okay so this might be little long and might have many spelling errors so i apologize in advance. So the story starts this year when my family and I found out that my dad cheated on my mom many years ago  and had a child with that other woman. Without going too deep into the details my mom decided to stay with my dad and fix the relationship and that's where they currently are right now. Now the other child that my dad had with the other woman is my half sister, I barely decided to reach out to her and pursue a relationship with her and her son.(my nephew) We have been getting along really well and my mother hates it. We have been constantly fighting because she says my half sister is a reminder of what my dad did to her and I just don't know what to respond. I was with my mom and supported her through this whole ordeal but i also found new family in the process. I just don't know what to do she is making me feel guilty that I visit her and my nephew saying that it really hurts her.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Dad cheated on my mom, had a child with other woman, try to have relationship with half sister, mom basically hates her.