OP, you've been with them a long time - don't you have a relationship w/ the MB where you can sit down and talk things through w/ her?

I would just say that you are noticing pretty consistently that the kids behave very differently when she's around because they're seeking her attention etc... and it's making things more difficult for you and impacting their behavior. Then I'd ask for her help and make a few suggestions about thinks you think would be useful. The kids sound old enough to understand being in told that Mommy is working and you are in charge, even if Mommy is in the house. They can understand that they are not to bother Mommy when she's working (and maybe come up w/ a signal for that - a little sign on the door of her office or something). And then the mother can help support those rules by not encouraging them, telling them that she is working and you are in charge, etc...

You need to just talk with her and work out a plan.

If she is unwilling or unable to work with you on these things (or see them as a problem) then it might be time for you tell them this is no longer such a great fit and you'll probably start looking for something closer to the original arrangement you had with them for 4 years.

Good luck.

- MB

I think you are between a rock and a hard place and I wish you a lot of luck.

About 6 months ago MB started a new PT job where she works from home, before she was working FT at an office. I have been with them for 4 years and watch 2 kids that are now in school full time but I come in a little early to throw in a load of laundry, prep dinner, etc before school pick up. When MB worked at an office or on the off day she is out of the house now, those days are BLISS the kids are happy, helpful, kind... but when she is around it is instantly a nightmare! The kids start resorting to baby behavior to get her attention, don't listen, are rude to each other and everyone around. It makes we want to put in earplugs and run away! She is very inconsistent with everything with the children, threatens consequences that never happen and on and on. I know MB has the best of intentions and the family is otherwise really great so I would like to make this work, have any other nannies been in this situation and successfully dealt with it? Or MBs what would be a way to bring this up that you wouldn't get your feelings hurt, crossing a line?
Thanks in advance!