Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first.
In what way is his family a risk to the children?
I can understand that - but has any child actually been hurt whilst with them in the past?
What drugs does your ex take?
I understand your daughter's concerns but the contact that she is offering at the moment - with her - is simply not acceptable.
It is confusing for the children and is not seen as good contact by the court.
I appreciate that the baby is still very small and accordingly time away from mum should be short but nonetheless it needs to be on his own and not with her
If there is drug use at the father's home then your daughter can ensure that they do not go there
I do understand your concerns about his family - but this is not going to be seen as relevant by the court UNLESS there is evidence that the children are at risk of direct harm.
There may be shouting - there may be drinking but this is simply a different lifestyle and not something that the court will see as being sufficient to stop the children spending time there.
Your daughter can find out more on sites such as the one here
Please ask if you need further details