Restrictions of the Jedi Order. Raven knew them very well, and that was the reason she joined the shadow jedi in the first place.
All the Jedi wanted her to do was to contain how she felt, bottle it in. Quite frankly, she was sick of holding back, shoving her true feelings in a jar, and throwing them out the nearest airlock.
She thought being in the shadow order would be different, but it turned out to be more of the same. They all talk about ballance, but still you had to hold it all in.
To be offered freedom like that was irresistable.
"I still hate you." she told him, grinning as she sat still. Raven still felt the the pain that threatened to override her, but she ignored it. He was his call if he wanted her to continue sitting in the chair, bleeding all over the floor of his ship's lounge.