I think, Lo is trying to ruin the friendship between Audrina and Lauren.   Since Lo has started showing up and hanging out with Lauren, and now they live with each other Lauren and Lo don't include Audrina in anything concerning the house.  What I didn't like is when Lauren and Lo bought the puppy from the animal shelter Lo makes the comment that the puppy will have to mommy's to pick the puppy up at doggy day care.  That wasn't nice for Lo to say that because there is exactly three roommates.  Even though Audrina lives in the quest cottage of the house she is still part of the house too.  I just wonder how Lo affords all the nice clothes and is able to rent such an expensive house with Lauren and Audrina.  I know they all grew up with money.  Still she be shown at her job like Audrina and Lauren and the rest of them on the Hills.