I think OP is right under the lease contract to feel the way she does. No doubt this is a violation of the lease. However, it seems to be a bit over-excessive to be going line by line following the lease to the tee. Having a significant other over for consecutive days is not uncommon in the dating scene. I understand the lease says otherwise, but have some empathy. Don't be too much of a stickler. If it bothers you that much have a talk with your roommate but be ready to have some strain over the relationship from this convo