Anything you do for them during baby and toddler years does not count. You signed up for that job, and anything you are doing is solely for your own benefit of feeling like a good mother. Your child will come out just fine whether you breastfeed, bottle feed, leave them to cry it out, cosleep, use jar food or fresh purees. These are all choices in which the child has no control over and therefore owes you nothing for. If she wanted sleep, she should have gotten a dog instead.
When they're older and want to be in certain activities, yes they need to show they're responsible enough to handle it. But you tell them that when they sign up, they're also signing up for practicing at home so there's no ambiguity.
Anyway, she's laying it on pretty thick. This felt like a group pat on the back for all moms, not a letter for his own benefit.
My child's letter goes something like this:
Dear DD,
If need to respect and listen to me, because if you don't you're going in time out.
Love,
Mommy.