She's really not, Lee is staring at her shoes, which. For her, is very far away. She doesn't make eye contact even when she's looking in someone's general direction, preferring to speak to their nose or focus on their mouth, like a lip-reader. By the end of this she will likely know Stan as 'Beard' and Peggy as 'Nice Dress'. "I..." She swallows and fidgets with her hands, tugging on fingers, chipping at her already-chipped nails. "I just, I take pictures, for, um — for my friend." The word 'model' makes her nervous, it makes her sound like Twiggy or some other cool person, an impression she can give a reasonable facsimile of only until she has to open her mouth.
Like now. The reason she is with Ginsberg becomes steadily clearer: because Lee is so shy she can barely look at anyone and Ginsberg talks enough for three people.