I went from undecided to 1 and that's just right for me. People are still asking when is number 2 coming and I let them know 1 and done...Still zero desire to have another...
Kids are expensive, better do the research fully and see if you can handle it by yourself and raise the child appropriately.
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Here's one of the red flag gauges: If you need grandma to help babysit, you can't handle it..