My mother in law has a new partner we’ve only recently found out about, but don’t really know anything about him apart from he lives in Ireland and we are in the UK. She looks after my son a couple of times a week and has been speaking to this guy on the phone/facetiming whilst my son is there and letting him speak to him. He was over for the weekend and she had my son on the Monday, we didn’t know this guy was still here so spent the whole day with them. We’ve told her we didn’t want him meeting some stranger we’ve never met, the guy might well be fine but we don’t want him getting to know someone who potentially might only be around for a while. Are we wrong in this? She’s moaning he’s now in her life and there’s nothing she can do about it. It’s the fact she’s gone and introduced them and had him with my son and buying him toys without even letting us know.