Colin had custody of the twins for all intents and purposes and Sheila seemed to be quite happy with that arrangement. Grandparents had no rights in law whatsoever at that time so June was out on a limb whoever she was telephoning. Jeremy was a big spender who was always moaning he didn't have enough money:this comes from several sources.
Steve, I feel certain that you of ALL people will realize that if you say something with enough conviction, SOMEONE will believe you, which maybe what transpired when June had the conversation with her co-grandmother who may not have felt capable of arguing a point of law with a magistrate's wife.
So "Jeremy was a big spender" SAYS YOU, but if we look at this another way, MAYBE Jeremy was just generous to his friends, but not TOO generous because people like you would say he was bragging. Also, in my experience, those with the most money are the most likely to complain of its lack, so it is more than likely that Jeremy would say he was broke. Poor guy was between a rock and a hard place. There are leeches aplenty when it comes to sniffing out money.