He was seeking advice from me and I didn't even know what to say...

You will hardly know what to say cause one you hardly know much about those ladies and secondly you wouldn't like to take the blame if he ends up making the wrong decision.
Honestly that's a critical moment that wisdom comes to play and one has to go for the most important thing that matters to him.

Whether we are selfish with our decisions or we choose what is best for our children, at the end of the day, we should accept anything that we are getting.

This is true and we shouldn't blame anyone for it cause we are the one that made the final decision.