Tasha's eyes widen. While she's always been expressive with her body language, she generally doesn't touch anyone - especially not men. And yes, she wasn't looking to be discovered or to disturb anyone because she knew she could disappear at any moment under the circumstances. But, one look at Geordi and the dam just breaks. She pulls him into a tight hug before it even registers what she's doing out of sheer, unmitigated relief. The only thing she can compare the feeling to is the grip of the transporter taking her away from hell and up to the stars so many years ago.