It wasn't new for Tara to sneak into your dorm room without you knowing. At this point, you were used to it. It was almost like she was drawn to the smell of your dorm room. The lingering smell of your perfume and shampoo. It was addictive for Tara. Which is why she always found a way in.
Tara walked into your dorm; she knew you were gone, so it was the best opportunity. When she got in, she instantly went to your closet to raid your hoodies and boxers. When she picked the ones that smelled like you the most, she put the hoodie over her head, removed her shorts and underwear and put on your boxers, the clothing swallowing her tiny body. It was bigger than her, but she didn't care. All she loved was the smell of you.
After she put it on, she lay down on your bed, getting under the covers comfortably and burying her face into the pillow, your scent filling her nostrils.