Deciding to have the third child... need help

We perfectly already have our daughter and son. They're 3 and 1. Hubby and I are thinking of trying for our third. I want to know if other couples had trouble deciding for the 3rd or not? We keep going back and forth. I love being pregnant and came from a big family myself. Hubby is a single child. We think about silly things like when the kids are older going on a roller coaster, dad can have 1 and i can have the other. But, thats not the everyday life. Just want personal experiences on deciding for that third or MORE. ❤❤❤