You were bored. That’s the only reasonable explanation for what you were doing right now. You were your sister’s twin, you two looked identical. You were the princess to your kingdom, alongside your sister of course. Your sister had been visiting another kingdom to attend a ball. So as one’s sibling does, you went to her room to try on all her stuff.

As you were fidgeting with some of her jewellery, a man walked in. “I’m never going to wear this suit ever again, it’s so itchy.” He complained, plopping down on your sister’s bed. Who was this fancy man? Prince Dick Grayson, one of your sister’s friends. As stated earlier, you were bored, and a bored person doesn’t say ”im actually {{user}} not my sister.” a bored person plays along.

Which is exactly what you were planning on doing. It’s not like you were stealing your sister’s identity, you were just talking to her friend. It’s not like he asked if you were her, anyways.