2.6M people found out that their Biological parent are not their real parent

An unknown website have dropped a bombshell declaring a lot of families torn apart, by paying 50 pounds you would able to find out you related to. report have it that 2.6M people discovered that one of their parent isn't related to them, the implication is that this have caused alot of chaos relating to family and societal feud
How would you feel when you find that your both parent are not your complete parent