Pretty straightforward,
Would you wear somebody else's old nursing bra? There's no way I'd wear someone else's knickers for example, and a nursing bra is likely to have been in contact with bodily fluids. Breast milk seems a little bit less "grim" though I suppose.
It's a specific bra I want. Not moulded or anything so won't be out of shape. Two new bras are £80 ish, found two used/excellent condition online for £10.
Hot wash and a bit of laundry cleanser?
Or is it just a definite no??