I hate to pile on, but that's total bullchit. Sure, as a guy, PHYSIOLOGICALLY my body has its "refractory" period, just like anyone else, and I'm not as horny (nor NEARLY as kinky) as I was moments before my "O."
But as a loving husband, I have always felt it my obligation to try to help my wife "get there" if I "get there" first.
Where there's a will, there's a way.
Sounds like you know all this already, and it DEFINITELY sounds like this goes way beyond the bed.
Pray for strength, and do the right thing by you and your child.