My son whom i had adopted when i was 16 found me i had always left my details with social services so this was easy for him to find out,he has expected a great long search ahead of him but this wasnt the case he went to social services for his papers and there was my address and phone number for him everytime i moved i contacted them with my new details,anyway he did contact me i was living in germany at the time so i came to uk to see him and we got on well,but then over time relationship has faded,but i did meet his mum and she was overwhelmed to meet me but has left him to get on with it himself,i am not his mum she is his mum.I am 50 now and yes knowing what i do now i would have made a different choice at the time,but i was thrown out with the clothes on my back and that was it,no help from family as it was in them days.But i wouldnt lie to your mum,sit down and explain that you need to know and meet this person but it wont change how you are with her and dont forget to say you love her and no one could ever replace her