Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: We have some kids that moved into the country to live with their dad. So to help him out, we offered to do their laundry for a short time until he got the hang of things. It's been a few years now and they are still bringing their laundry for us to do. Sometimes they even bring weeks worth of it. 
A few months ago we told their dad that we could not do it anymore. Now the kids just ask and my mum cannot say no to them so they bring it over anyway. She does not want to tell their dad over and over again. Their dad has been cheating on their mum ever since they got together and introduced his gf to the kids (their mum lives in a different country) and he only takes advantage of us, isn't thankful and once told me that we were not doing him any favors. My mum does not want to cause any issues but this simple thing is causing a rift between us because she just let's it happen even at her own expense (it's a lot of work, expensive etc...) I told the kids once that it is their dad job and they said "ok" but the next time they just brought it over again. I have a feeling their dad is coercing them to do it and I do not think that it is fair since we had told him to stop. 

Tl;dr: WIBTA if I told them to stop again and let their dad do his job? Their dad won't answer our calls or respond but we know he gets our messages. We know he has the time because he uses it with his gf's but chooses to pile his responsibilities on us while being ungrateful. 

telling them to stop making us do their dad's job