It looks like a great fit Alfa Q. I feel the new red one, although a bigger cup size, looks and appears to give you a slimmer bust line.
It's hard for some to wrap their heads around the fact that we do have a big bust and should be wearing support for that. Perhaps over time she will realize your happiness and comfort while wearing and feel better about it. Ware it when you can and I'll bet she won't even realize you have it on most of the time. She already approves and suggested that for you. Then go from there. As most of us here say. Layers, patterned shirts dark colors all hide the fact that we're wearing a bra.
Good luck. looks good!