Outwitted by Thomas as usual

"Mom, when is my birthday"
"It's September 20, 2013, wait no 2010"

"Did you forget?"

"No, I never forget"

"Then why did you say 2013?"

"That's when Oliver was born"

"How could he be born in 2013 and me in 2010 if I am older than him. 13 is more than 10"

"Because 2010 comes before 2013 which means you were born before him, remember that 10 comes before 13?"

"Right, because I was born first. I am the first person that was in your tummy and then Oliver and then Juliana. All of the kids before me were redopted, right mom? right?"

"I don't remember Thomas, I have no idea which of you were adopted and which were not, but I do know that somehow you are all my wonderful kids."

"Ha! See, I knew you forget!"

Ps. Thomas was actually born in 2011 as pointed out by V during the writing of this post.