I thought I'll never give up riding, however in real world things are different.
It is an easy decision actually - how much do you want to be a part of your family's life.
It isn't about being killed on the motorcycle, this can happen anywhere, anytime in any vehicle. It is about being there and helping, especially in the first 2-3 years. There is a bonding time that you'll never get back.
For me it happened naturally, can't ride after an all-night awakening every hour or when you take over to allow your wife few hours of sleep.
Long story short - kept the bike for year and a half and had less than 200 mi on it, mostly going to the store for last minute baby supplies. Sold it (got rid of the temptation and pain, looking at it). Seven years later got the new one. Wife was as happy as I was.