I think you need to think about sitting down with them and having a discussion about boundaries and also about when the kids will have visits with them. If they would like to see the kids outside of the agreed times then they need to speak to you first not just turn up. This will upset the kids routine which as parent we know this is important. Also no violence around the children otherwise access will be terminated if you don’t do this initially it will be harder down the track good luck with it all I know your frustration.
Published 25th May 2019