I was 16 and 8 months when I had my daughter in 1977. I’ll cut a long story short my relationship with my then boyfriend didn’t continue and I went it alone with the help of my parents. My daughter always knew what the story was and knew of her biological father and his family,my daughter went to a 30th birthday party and one of her half sisters was there and later in the evening my daughter said to her do you know we have the same father and she just froze and said what. My daughter’s biological father and wife had never told there children that they had another sister.