Did you RNG this already? >.>
[Inappropriate? She's a little sad that he thinks so. Pulling back enough to look him in the eye, while not relinquishing her hold around him,]
It's not inappropriate to show affection for someone you care for. [She smiles at him again, but it's going to do no good to try calming him with words. Instead, her hands gently rub over his shoulders; that has to be at last a little soothing, yes?]
[No more protests now, she'll just lean in and nuzzle the tip of her nose against his for a second, almost as a warning so he won't -- jump, or yelp or something, as she presses her lips against his. Soft, and lingering, and hoping to convey her genuine feelings for him rather than some sort of frightening thing.]