ayl0212, hehe.. i know what u mean.. Although mine #1 don't openly show that he is jealous (or maybe he is not) of #2, he misbehaved alot and came out with a lot of new and irritating patterns that made us was to wack him.
#2 on the other hand, seems to adore meimei.. Every chance he has when we are not looking, he will quickly run to meimei and kiss her or sayang her forehead. But when i bf-ing meimei, he will run to my door and call "mummy mummy" until i answer him.. That's jealousy?
As for #3, i think i'm quite lucky.. her last feed is at 11pm and if she wakes up in the middle of the night, i just need to carry her from her cot to my bed, place her beside me and she will auto zzz and wakes up when i get out of bed (so if i sleep beside her till 10am, she also wakes up at 10am).. And most of the time, i can heard her tummy growling the next morning.. Loud and clear.. haha