Do you worry about your boobs pressing up against someone when you hug, or their bone pressing up against you?

My girlfriend started out nervous of pressing her breasts against my chest. We talked and now she is better but she is still occasionally hugging weird and keeping her hips back away from me occasionally. It is so noticeable cause she pulls me back when she does it and I have to try not to fall.

Is it she is nervous about it but at other times she is happy to press up against me what do you think?
Do you worry about your boobs pressing up against someone when you hug, or their bone pressing up against you?
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