Why would a man who is not in love with his wife have children with her?
He sounds like an idiot for starters. If he doesnt love his wife
eventually the children will see this and they will not have a good
example for relationships. Maybe he does love his wife and is just
telling you that. Some people unfortunately when married think
having kids will improve the marriage. So very wrong it only
complicates things. Then others have a loyalty feeling or financial
limits that don't allow them to leave their spouses if they are
unhappy. So the live two lives. I myself would not want to be
sloppy seconds to anyone and you shouldn't either.
If this is a married man saying this to a female other than his
wife, I would be very suspicious of that because it probably is a
lie. He is minimising the relationship in order to either cheat or
keep his lover (who he cheats with) on a string. If this sounds
like you, I would get out fast. He isn't going to commit.