i don't think it's a battle you necessarily have to avoid all together - just have to be very careful how you approach it. i have had to do this with numerous people, and none have responded badly because of HOW i approached it

Generally, i've stated that i noticed i was getting more allergy flares during pregnancy (total truth - many smells, including my fave candles, started giving me killer headaches!), so i felt my own response was to blame, but pretty much all perfume was triggering it, and would they mind not wearing perfumes around me/bub. i cushioned it by putting the blame on MY sensitivities, and made it a blanket thing with no perfume at all, rather than one particular perfume being a problem. My mum was the only person to actually question me, cos she has worn the same perfume for ever - but i just said i thought i was reacting more as the perfume was ending up on bubs clothing and so i was being far more exposed. DD is now 3 and it's only recently that mum has started to overdose on perfume again, so i gave her a gentle reminder the other day about it

i'm lucky (in that it's not visible) that my main allergic response to strong perfumes is headaches, and very unlucky at the same time (migraine level pain is so much less bearable than sneezing! i was worried DD would react similarly, so that was an added reason, IMO, for me to ask the question.

i didn't have a single person argue or take offence or refuse to be around us after being asked nicely to not wear perfumes around DD.