Yeah, I think the first time, at Ganymede, it was probably cause he reminded her too much of Marco. Having causes without caring who gets in the way.
The second time it seemed more nostalgia for her old life. Marco had kinda soured it for her but Holden made her feel she could work for something bigger without being a bad person.
Now that we've seen her history with Marco it fits with some of her hang-ups to me. She's very bad at discussions, not able to share her reasoning or feelings for her stanse. Probably cause years with Marco taught her that any feeling or explanation is j