Another vote for baggy t-shirts! Also, practice nursing in different positions at home. I'm large in the chest department, and I have to position baby very differently depending on whether I'm reclined, sat cross-legged or in a dining chair- style chair (this could be true for other body types too, but I'm rolling with only my experience here). Having the positioning nailed means you and baby (remember they have to play their part too, and if they're uncooperative there's only so much you can do) understand what the plan is, to whap them on quickly. E.g. I know if I'm feeding in a dining chair, I have to support my boob/ sandwich it into Baba's mouth in a way I don't have to on the sofa.
However, bottom line is that Baba needs feeding - anyone who feels negatively about a rouge boobie needs to get over themselves. You're doing an amazing thing ❤️ big hugs from one feeding mama to another.