Thank you for your question
My name us Clare
I shall do my best to help you but I need some further information first
How long hav ethey been separated an dhow often does he tale the children to "meetings"?
Was he a Witness when they were married?
Did he take the children to meetings prior to the divorce?
How is the care of the chidlren shared between them?
The issue of religion is one which neither parent can simply impose on the children - it is something that needs to be discussed by the parents using Family mediation
In fact this issue has been addressed by the court in the case here
So whilst he can take them to meetings onhis ocntact days - the bible study needs to stop.
There should also be a set pattern of contact for the sake of the children.
I hope that this is of assistance - please ask if you need further details