After watching her father and mother suffer the effects of debilitating illness, the author Ann Thwaite explains why she rejoiced at news of her parents' deathsHave you ever been asked to admit to the happiest moment in your life? I think it is supposed to be on your wedding day, or the moment you held your first-born child. It is the sort of question daughters are inclined to ask, and I remember shocking one of mine by suggesting that my happiest moment was when the examiner told me I had (at last) passed the driving test.I have never before confessed that my happiest moments were in fact when I was told – 27 years apart – of the deaths of my parents. ...