BIL has been in a very volatile, unhealthy relationship for the last four years or so. During this time a child was born. Relationship is very on and of. Wider family have probably met his girlfriend once. Anyway both BIL and her have addiction issues and not good for each other.
There has always been doubt about the child's paternity from BIL for many reasons. They had a huge argument two weeks ago and she threw him out of the house. BIL has now ordered a paternity test. He has however stated that even if the child is not his he still wants to be in their life and he won't tell the child or mother of the child the truth.
Myself and DH think the whole situation is wrong on so many levels.