JaydeeTas, if you enjoy it and it helps them, it can only be good for everyone, especially the baby as he gets the benefit of a routine with you - by three months old a routine should be firmly established. I remember the best piece of advice my mother gave me before my first baby was born was to get him into a routine as soon as possible. Not having a routine is very unsettling for a baby and this is why your son and daughter-in-law are having problems. Hopefully, they will soon realise that a baby does not fit in with the parents’ lifestyle, the parents have to change their lifestyle to fit in with the baby.