ive been playing the game for about a week and the furthest ive gotten with both of them is oral and footjobs. and is it possible to have a relationship with the delivery woman? 

yea later on in the game 

FOLLOW THE NOTEBOOK

As the creator himself said you must follow the guidance from the notebook.  You'll have various things to do that each can require a week of virtual play time.  But you'll get there in the end. 

no. No you're not

indeed, there is a storyline with Mia, you’ll see yourself while playing or you even got there already ;)