Does anyone regret having a second child? That just sounds sad.
I didn't get to choose, Sozobe. My second was conceived while I was recovering from the first pregnancy (and taking birth control pills), so my two are just 13 1/2 months (MONTHS!) apart. It was pretty crazy while they were young, but it would have been crazy anyway. Because they were so close in age, it was much easier to gear our lives to their abilities... and we did a lot of things -- traveling, hiking, back-packing, road trips. We were active in pre-school stuff and continued through public school, sports, music, etc. They fought when they were younger, except when we were traveling
, but they're 20 and 21 now and good friends who chat on the phone, plan stuff with the other and chose to travel together with friends to take Spanish classes in Costa Rica. The older one, for example, taught her brother how to drive her five-speed car, then took him to get his driver's license. It is a relief for me & their father that they get along and we hope that as they grow older they will maintain this relationship. I suppose it will depend in part on their spouses. The world can be cold and lonely. It is nice to have someone you can count on who has known you your entire life.
I have four siblings, my husband has two. All four parents are gone, so we are especially glad to have a lot of family near and far for support & companionship. I can't imagine not having any siblings, but apparently plenty of people don't like their relatives or don't have any. Somehow they manage fine.
I don't envy you your decision, especially since the Sozlet has already said she doesn't want a sibling. Maybe that's your answer right there.