I said don't be! I'm sure you're not.
Back when you were an a person (and I bet your kids don't think you're a non person) what did you do? What was the rhythm of your life? Friends, interests, ambitions?
Do you like walking? Art? Wine? Mucking about with your mates? Are there any mates? Shopping? Films? Coffee? Family?
You don't really need words, you just need to remember what you love or what you want to do and say
'By the way, can you please make sure you're back by six on Thursday cosI'm meeting Jenny fir a glass if so e and then we are seeing a film. I should be back by 11, and it he kids will have been fed so you just need to do bedtime. How was your day?'
Then you build up slowly to ' sweetie. You need to take next Friday off so I can meet Julia in Wales for some hiking. We've booked into a gastro pub and the details are on the table. Ben has swimming Saturday morning otherwise you're jn charge of activities. Dan g, why are you sobbing under the bed '
Etc. don't comment if he feeds them crap or lets them watch tv all day. He needs to learn how to operate his own kids before its too late and they have left home.
Good luck, and it's completely fine for you to do this!!