It is bad of her, considering how much he hates it, but in a strange sort of way the Hulk does make her feel safe, in the same way as her security system and panic room does.

Bruce is about as close as one can get to being invincible and yes, some primal part of her responds to that. It's not something she is particularly proud of, fiercely independent as she is, but it cannot be denied that she is a person who likes protection, and now, well... now she's got it.

She kisses him back, feeling the sting of tears in her eyes for some reason.

"Always. Always, always, always."

Between each repetition of the words she kisses his eyelids, his forehead, and then his lips again.

"Even if you leave me again."

Not as if it changed anything the first time around.