So just to clarify (I've just come across this game, so please excuse my naivete), this 'Eric' guy is non-negotiable and no matter what you do he gets with your mom and sisters?
At this point Eric WILL be in the game and with Ann/Mom. It is LIKELY that he will try to get with Alice, Lisa, and (when she arrives) Kira. One of the big discussion points is if/when we can REMOVE him, and how (I like the idea of lock him in an almost full Septic tank and forgetting he ever existed

).
Currently (version .03) I figure that he'll be around for at LEAST 2-3 more updates before we can remove him. Until then (and possibly after) there will be options for being his friend (Must SMASH Evil SCUM Eric) and peeking or working with him. Later, we will be able to get rid of him or keep him around. I don't know how the story will change from the original, but I look forward to learning.
Now for the silly suggestions portion of my post.
Aleksey90 please consider adding an option to HELP Lisa with homework, I'd love to have the chance (1-2 images) where we can teach/explain what to do and SHE gets the homework RIGHT. For myself I would like that instead of only having the 'Help' and make mistakes, or Max doing it himself and getting it right options. It's just a thought for an EXTRA (good?) choice.
Also, it might be fun if Max discovers the WONDERFUL world of Cat/Kitten videos/Pictures on the internet AND becomes a TOP photographer making money that way.

Just imagine the JOYFUL fun we can have managing Photo shoots, Purchasing Cat toys, and making sure we do NOT run out of Catnip.

There would also be the benefit of having cute kittens around to help melt the ladies hearts.
Just some thoughts.