She should not trust him the way she does, she knows that.
His lies sorround him and protect him, sheltered by truths and small admissions. Traces of his secrets are well hidden beyond the walls he has build for protection and she hates that she can see just enough to know that trusting him should be nothing but a foolish idea.
So when they move together and his mouth is in her hair she scratches deep marks down his back, tears at his defenses and makes his lies her own.
Her trust is not unconditional and it comes with a price.
She has learnt to play his game, has learnt to know when to contradict him and when to stay quiet and have faith in him. Her loyalty to him has become second nature after New York and it is paid off in rare in-between moments when he tells her about his plans and lets her in on a few of his secrets. He never tells her all of them and never gives her all the information he has but it is more than anyone thinks she knows and certainly more than anyone else would ever know. It is both frustrating and liberating and when she bites down on his neck her teeth bury in his skin and she becomes one of his secrets.
Soon he will leave again but his presence, however short, was an admission in itself.