why is one of my cats so attached to me

I have two cats, but one of them is really attached to me. Like She's my baby or something. It's fine that she does it, it doesnt bother me at all but I am just wondering why she's so attached? She follows me all around the house every where i go, even to the bathroom. She will cry and cry when she cant find me. So when I hear her cry i call her name so she knows where i am. and she comes running. She's always sitting on my lap. She sleeps on me. And sometimes when she's sleeping like on the couch and i am sitting on the couch, and later i move to the computer desk she will wake up and sit at my feet and then fall back asleep. Is it bad that she is this attached? And how come my other cat isnt this attached to me? I am pregnant should i worry that she will get depressd when that baby comes because she is so attached?

I've got one cat like that -- she's sitting next to me now. It's so sweet when she comes to sit on my lap because she puts her head up on my shoulder (she's a big red tabby), and she'll lie against me almost like a baby. I just love it. My wife refers to this cat as my girlfriend; if she meows to be let into the room, my wife will say "Hey, your girlfriend wants in."

So no, it's not bad that she is this attached. And yes, you should make a point of giving her attention when the baby is born. That can work out really well, by the way; we had a beloved old cat (who lived to the ripe old kitty age of 19) when all our kids were born and growing up, and she ended up loving the children and "teaching" them all about how to behave around cats.