Colin just woke up, and as I was changing his diaper:
Kristen: Colin, you are going to be a big brother soon!
Colin: Yeah
Kristen: Are you going to be a good big brother?
Colin: Yeah
Kristen: Do you want a sister or a brother?
Colin: No!
Kristen: What do you mean no? You are going to have one or the other...we aren't having a monkey for a child!
Colin: No!
Kristen: Do you want a sister?
Colin: Nooooooooooooooo!
Kristen: Do you want a brother?
Colin: Nooooooooooooooo!
Kristen: But, you're going to be a good big brother?
Colin: Yeah
Kristen: So, you don't want a brother or sister?
Colin: No, no, no, no (shaking his pointer finger at me)
That's what my precious 18 month old thinks about having a sibling. Hopefully he'll change his mind soon enough!