I have been babysitting for my sister and her husband for 5 weeks now, they have a little boy who is almost 5 and a Little girl who is almost 3, and they have a really hard time with the kids when they get home, as soon as they get home the kids scream and fright and yell at each other and their patents, they don't do this when it's just me and them because I have rules about doing that( timeout in the corner for fighting yelling and hitting) as far as them being rude to the parents I make them go to time out then apologize to their parents after I talk to them when they calm down about what they did was wrong , how that makes their parents feel, and how they wouldn't want their parents acting that way towards them. When it comes to bedtime it's a huge task( I don't have to get them to bed but I do watch them when my sister gets home or her husband but I choose to because they pay me and I am their aunt after all) Anyways getting them to bed is hard for their parents they scream yell and cry when they want to go to sleep which is around 111pm to 1 am ( it's this late because they just won't settle down anytime sooner) I think this bedtime for them is ridiculous and I want to put a stop to it because their parents go to work early( getting up at 6am) so what I was wondering was what are some good activities that will wear them out? And do you think I'm doing a good job with the kids? If not what am I doing wrong?
The kids wake up from 10:30am to 11:30am
I try not to give them junk food of sugary foods or drinks
I try not to let them take naps but allow it of course if I see the child falling asleep while playing or eating or if they tell me they r tired
They have a bath around 12pm to 3pm depending on what time they got up and how late they eat breakfast( bath time is before lunch)
I got my sisters approval on waking the kids up at an earlier time regardless of what time they went to bed and for them to play outside for an hour or two so I can make their lives easier

