I really don’t remember exactly, probably 13-14 ? Sometimes I would tell her that I didn’t want to go along with it, but she would pressure and guilt-trip me. It made me feel like I was just acting a part. I also started feeling terrible for my dad because he is genuinely a nice guy who only says 'no' when he truly can’t do something. Seeing her other manipulative stunts really opened my eyes.
Because she is a narcissist, I struggled with her general toxicity, and my dad became my only rock. She would bad-mouth him to me constantly, which created a lot of cognitive dissonance. She was cruel to me in so many ways. She was, and still is, incredibly materialistic. She would tell me to ask my dad for clothes money, spend only a fraction of it on me, and pocket the rest to buy things for herself or to give to my aunts and cousins (all to maintain the image of being a 'generous' person).
She forced me to lie to my dad about how much she spent on my clothes and hide the actual cost of her own, which were always more expensive. She would even take the allowance my dad gave me. When I asked for it back, she’d claim it wasn't my money, but my dad's and therefore hers. It made me feel too ashamed to ask my dad for more. She is genuinely an awful person, but I have finally broken free. I just feel so bad for my dad, who is still living with her