So I'm a first time mum and I find out the sex of my baby in two weeks, I might want to keep it a secret between me and my so and my mother(she's paying half the scan so she'll know) but when I say this to my so family(his sisters and brother) they're saying that they'll be angry and that I can't do that, making me feel awful for wanting my baby to be a surprise, should I be annoyed at this or do you think I should just tell them?