Exactly this. It's super easy to do some basic dumbbell back exercises with even girl weights to build up any basic muscle since people tend to do fucking nothing. Keep the titties, just exercise to compensate.
She's actually too aggressively normie. Because she's so naive about internet shit, she has said stuff that if she had troons in her audience, they would have freaked out about "transphobia" on Twitter (men in dresses, I'm a woman, etc)
My wife is about Airi sized. And let me tell you, pregnancy can do wonders for destroying the ability to fit into bras right. And I'm certainly not complaining.