Well, if you tell her it will seem rude. You could buy her scented candles as a gift. Or have you heard of those Scentsy things? They work really well too. Maybe she'll use them and it will help with the scent.
Well the odor isn't, going to disappear, she is already use to it.What more or can you say that the odor is strong,if she wants you to find some product to help illuminate it.Kinda tell her it,s not healthy for her to keep breathing it,just a shot in the dark.