At least according to this month's issue of Woman's Day magazine, she might be (I've already devoured my issue). The supposed pregnancy comes after months of effort including fertility treatment. An "overjoyed friend" told the magazine:

"Nicole and Keith are having a baby. They've been riding on clouds since they got the news. Nicole's been hoping for this since the day they got married. Everyone knows how she's been aching to have a baby. It's all she's been talking about for ages." (Source)

I'm calling bullshit on this story. First of all Nicole is way too white, she's like a damn ghost. I don't know why that would prevent her from becoming pregnant but I feel like it should somehow. And second of all Keith's hair is way too long. According to my Dad, guys like that are too busy burning draft cards and smoking pot to make babies.