Actually I was watching a program on multiples, and it can happen. If the fertilized egg is an XXY and when it splits, on egg can loose the Y becoming a girl.
I had the same stupid questions with my twins . And some even asked if it was 2 boys or 2 girls even though one was dressed in blue and the other always in pink
Yeah in theory but it's incredibly rare. There is one known case in the world somewhere in the USA, I believe.
helen, i get asked if my 2 are twins and there are 14 month between them! granted callum is big, but sheesh!!!!
I thought your two were twins..