My relationship with my mother has never been great. She had me when she was very young and obviously I always assumed I wasn't planned, but a relative drunkenly revealed at a family event that nobody knew she was pregnant until she was rushed to hospital. Apparently she told my aunty she needed to leave work early as she had pains in her stomach and thought she might have appendicitis, then she was taken to hospital and my Dad received a phonecall telling him she was in labour. I became very upset when she told me as nobody has ever even alluded to this, even my grandmother who is very candid. My aunty was then sketchy about the rest of the details, but said that my mum had gone from very skinny to around a size 14. She said that my Dad didn't know, but how could he have not noticed? She said that my Mum always said that she didn't know she was pregnant, but my aunty suspected she did but didn't want to tell her mum as their relationship wasn't great either. My partner doesn't understand why I'm angry and upset about this. I haven't told my mum I know and there's no way I would. It's made me feel like I'm a dirty little secret that nobody's dared to talk about for over 30 years.