It was only a year later when her areola developed that she felt she had to cover her breasts.
In the end we had to let her have it her way. At the same time she complained about her eldest brother who had started to get frequent erections which he couldn't always hide which she found was gross! We failed to make her understand how this was in a way just the same and that according to her own feelings she should get dressed in order not to offend the others. She refused and she even argued that two of her friends used to be topless at home also and one of them had also started to grow breasts. In a way we were driven by both our boys who both started to look at her in a different and definitely interested way.
Well, to be precise, we didn't ask her right away when her breasts first budded but only a few months later when they started to really develop. We know this problem! We too had let our daughter go topless at home when she was a child and she didn't understand we asked her to start to wear a t-shirt once she started to develop breasts.