Half-sisters but sisters
Dina and her sister are like night and day. Dina is dark blonde, her sister is more light-skinned. People have always wondered about them being sisters.
“Later on, I asked if my sister and I had the same donor. The answer was no. The fact that my sister suddenly became my half-sister was a big thing. It challenges the general perception of family, but for me it doesn’t change the fact that we ARE sisters.”
Dina’s parents, who later divorced, met each other when they were 29 and 31 years old. It wasn’t until late in their relationship that they decided to have children. And her father knew that his fertility was not at its peak. When they later made the decision to use a sperm donor, they did not think about reserving donor sperm for a future sibling. That is why Dina and her sister are not fully genetically related.
In return, Dina's parents made it a precondition for their decision that they would be open about their choice to use a sperm donor. That openness should also apply to the children, and that is why they have told them since day one.