To be honest, I am quite lewd. Sometimes when I see my sister sitting in front of me, smelling her breath, I can't help but look at her chest. The more I look, the more I want to take off her clothes.
Of course, this is just a thought, and I haven't acted on it. My sister hasn't noticed what I'm thinking. She's just concerned about the questions in her textbooks. Also, she occasionally asks about the relationship between my girlfriend and me.
She seems curious about my relationship with my girlfriend, and occasionally offers opinions as well. I am happy to cooperate with her.
At least I don't feel repulsed by it.
Many things are hard to recall at once. The thing that left the deepest impression on me was the few days before my sister's exam, because during that time she wore very little clothing and slept in the same bed as us.