I agree, it would be fun to pay as the brother. I also think some content where, because he thinks you are a slut he is willing to do stuff you might not want (such as coming inside you in the shower when you ask him not to, being more forceful about stuff during the homework scenes, or doing stuff when you are sitting on the couch) would be a nice addition.
Still having trouble with the stepfather and Misha content. Both have done stuff individually, but acting sexy in the garage gets Misha to look while stepfather is not looking. Nothing progress past that. Is there something else I need?