up until last week my 4 month old son loved my parents but suddenly screams at the sight of them! not just crying but full on screaming which is inconsolable. is it normal to suddenly take a dislike to certain people at this age? they are both quite 'in your face' with him and my mum wears A LOT of strong perfume.. those are the only things I can think of! he has been fine with everyone else. has this happened with anyone else and has it got better? thanks in advance.