Indigo,
I agree with shootingstar, that if your daughter chooses to be a strict vegan, you should not have to be the one cracking your head over what she can or cannot eat all the time. Since she is old enough to make the food choices that enable her to be a vegan, she should also be able to take enough care to make sure she is eating healthily. Learning to cook for herself will mean that she gets to experience how complicated food prep can be and so she will learn to not complain. It also means there are more things for her to eat, and who knows, some of them might be good enough to tempt the rest of the family as well. (Then occasionally she can take over the cooking dutiesleaving you free to go for as nice long ride)
In my home my parents have always worked full time so cooking duties always fell to me. I cook well, but occasionally there are some slip-ups. Or sometimes, especially these days when i come back from work exhausted (with more work waiting to be done) and dad and bro are just waiting for a meal. I'm happy to cook more (I have to eat too)
But I understand the frustrations of having to prepare food around the various likes and dislikes of a whole family of people. Having one vegan makes it even more tough I imagine. Fortunately for me, no one dares complain (because then I will just cook for myself for a week and all they can have is the smell of good food.)
Oh and another good jelly substitute for gelatin is konnyaku (a kind of japanese yam) It makes excellent jello and is full of fibre.
As for the original topic of fabric softener, I don't use any either, because its hard to know what kind of chemicals are in it and i have unidentified allergies to chemicals.