A kind childhood friend with big breasts who has been having sex for a week to protect me from bullying.

I have a childhood friend who I love and I'm close to at school. But there are bullying kids in my new class who use me! When my childhood friend warns me about helping me, he says, "If I date you for a week, I won't bully you anymore!" and it's an incredible exchange! In order to protect me, my childhood friend ends up dating a bully (continues having sex) for a week! Even though she peers over the two of them having sex and is almost crushed by guilt, she still gets an erection. And it wasn't just a look...