No no no no... I'm not pregnant with twins (thanks to the effective birth control method :p) but referring to the kids' look-alike baby smiling photos. hehehe Time to reveal the answer.
Deng... deng... deng... deng...
Pic 1 - baby in blue pajamas is XY
Pic 2 - baby in red bear prints is CE
Good guessing everyone! For those who got it right, Congratulations! (you don't need a medical dictionary to figure that out, right? hehehe) But if you didn't, it's totally understandable coz even PaPa couldn't differentiate some of their baby photos at one glance.
By the way, I didn't choose their pictures in blue and red clothes to mislead you. It was just a coincidence. Really! And the red bear prints tee is a hand-me-down from XY. :D