Fiona Gallagher. Played by Emmy Rossum. Fiona Gallagher. Fiona is in the difficult position of being the oldest of the Gallagher children, so most of the responsibility and child-rearing falls on her young shoulders. This young woman takes it all in stride -- she's clearly been doing it for a long time.
Take a look at a typical pancake recipe - it tends to ask for eggs and milk, i.e. protein. Pancake mix only needs water, so it will have a higher protein content than normal flower (and is probably flavoured). So you probably can't replace flour with pancake mix in a recipe and expect the same results.
If you're making pancakes, then you already have the mix, so there's no need to substitute the flour when you already have it and all the other ingredients. The problem with substituting straight up pancake mix is that you don't know how much of the other ingredients are in the mix...