Your adult child resents the way you parented them. Here's how to handle it.
What Is Only Child Syndrome?
Amazon.com: When Our Grown Kids Disappoint Us: Letting Go of Their Problems, Loving Them Anyway, eBook : Adams, Jane: Kindle Store
Sure, I can see charging a small amount of rent to your child who has graduated (I wouldn't), but then doubling it to try to make your child take responsibility for YOU