Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
What is his immigration status at the moment?
have you agreed that he can bring his son to your home?
Who owns the property and do you intend to end the marriage if necessary
Who owns the property?
What income do you each have?
I am sorry for the delay - I was trying to see a way through this for you without starting divorce proceedings.
Unfortunately there is not.
There is no way that you can prevent your husband bringing his child to the UK.
He can also bring him to the house whenever your husband himself is in the house (although legally you could make him take the child with him every time he does out)
The only way that you can make it clear that the child will not live with you and your daughter as a family is to start Divorce proceedings.
This need not be expensive
The process is described here
You may be eligible for help with the £550 fee - that is why I asked about your income
I am sorry for the length of time this took - it is hard sometimes to try and get enough informtaion to look at all the options.
Please ask if you need further details, or still wish a refund.
You do not need a solicitor
You can deal with the divorce yourself.
If you have a low income then you will not have to pay all of the Petition fee