It’s good that you have given her an ultimatum and told her she has until the New Year living with you. Perhaps, in the interim, you could lay down ground rules about what she should be doing and what you are willing to do to help her: for instance, she should be the primary caregiver for all her children, which means budgeting for their clothes, food etc ( that should clip her wings when she wants to go out on dates.) she should get them up in the morning and feed them and get them ready for daycare while you keep out of the way. Perhaps then you could offer to collect them if she is at work and give them their evening meal, but she is to take over when she gets home and bath them and put them to bed. This will be hard work, but it’s the reality for most single mothers, and married mothers whose husbands work late or on shifts. Then you should be out of the house one of her non- working days- go for a drive and a walk, or visit friends or family. That way you will have a day off. Can you arrange your home so that you have one room which is out of bounds to the children? She needs to face up to her responsibilities and start acting like an adult, but I appreciate you are concerned about your grandchildren.