The guy in the middle is the one who is created by some kind of photo editor program. :)
And according the formula to calculate the tall of your kids, which is listed below, their daughter will be 199.2cm and son will be 224.6cm.
Gile in cm = ( Father + Mother ) * 1.08 / 2
Boy in cm = ( Father * 0.923 + Mother ) / 2
well, curiously, I calculated for my daughter who will be 162.6cm, and my son, if I would have, will be 183cm.