Your assurance is nothing but wishful/positive thinking and not based in facts.
Let me address the points you made:
1. as she's 21, waiting a few years to consolidate their relationship would have had a negligible negative (more so in statistical than real terms) effect on her physical capacity to get pregnant/give birth but a huge, actual effect on her mental and emotional capacity to handle the challenges of pregnancy/birth and raising a kid
2. re Catholic faith, it approves natural family planing, so it's a non argument here
3. the friends living and dying from party lifestyle have no bearing on this case as I wasn't arguing the point that he chose to be a family man.
4. you're reinforcing the argument he's a good provider/money mule, which I wasn't contending at all.
Sounds to me like you're presenting an archaic model of tradwife where the guy is basically an ATM and the woman a baby machine.
That's EXACTLY what a newly married 21 yrs old guy full of testosterone and who abstained from sex until marriage needs. #sarcasm