Mums, what is the longest gap you would have from your last child to your next? I have a 12 yr-old. The gap seems way too big for me to have another baby now. Any opinion on this?

In the forum that I frequent, there are mothers who have children with an age gap of 20 years, as their first child was conceived when they were in their teens. I believe they can still be close, but the elder sibling will be more like a mentor than a playmate.