Yan Yan can put in pork when the dishes nearly done, therefore, they still have something to eat, no need to make another dish for herself.
I have a family of 4 (2 adult & 2 kids), I never care about my Yan maid about eat, because she will find her ways to enjoy every meal (put in Indo sauce/ chilli/ crispy garlic....etc), of course, we still have vegetables, steam fish as usual.