Answer:
Care to believe what he is saying? Then 1. His wife, that is all.
Actually you can go even further, 7 kids? He has had sex with his wife exactly 7 times. Why? Because any time a sperm or egg is wasted it is murder, and if they had sex more times than the number of kids they have had it could be seen as sex for pleasure which is just about the worst thing a person can do.