Apologise

You don't want her to go away. She probably won't, but there's always a chance that she'd panic.

"Sorry for that. I was looking at your tits and..."

"And?"

"I mean, everyone's walking around nude with their tits hanging out. But that top of your's just squishes them together."

You trace the depths of her cleavage lightly with your finger to make your point. You're relieved that she doesn't move away or push your hand away.

"So you're saying my breasts will be less enticing naked than they are now?"