Few with Jill, if you go completely DIK than you have to wear the dick helmet which prevents you from rubbing Jill off when you spend the night after Jock boy attacks you.
You also loose out on the shower scene after the Tennis date.
With Bella, if your going DIK route I don't think your blocked out from staying with her after you leave Maya and Josy? But if your DIK you want to go to stay with Sage for all the extra DIK stuff you get to do, which means you'll miss out on the Bella pool and shower scenes.
Also if your paying for Quinns menu? A few of those will prevent some Maya scenes, Watching movie/and almost sex before Josy shows up.