How did you know you were "done"?

Jenna

My husband and I have always agreed that we wanted two kids but we're open to a third if we were financially able and had the room. Well we just had our 2nd child in March. So now we have a boy and a girl. My question is.. how did you know you where "done" having kids. I still toy with the idea of a third then later think about it again and think "neh. I have my boy and my girl and was lucky enough to have two healthy pregnancies and babies so why push my luck?". So for those of you that decided however many children you have is enough, how did you come to that decision? And did you ever regret not having just "one more"?

Also to add, yes we are financially able to have another if we wanted and we bought a 4 bedroom house last year so we definitely have the room. It's just a matter of do we want more children or not? I can't make up my mind. Lol.