Me too on the reading. I've read all those and many, many more. I think Passionate Marriage is really the best.
As far as flowers...I think you should do as your own feelings dictate. If I did send flowers they wouldn't be roses. Something unusual would be better. The note I would send would have a friendly tone - as in, Happy Valentine's Day to the mother of my beautiful D. The closing should be "with love" - slightly less personal than love. I wouldn't write anything about reconciliation or anything of that nature. Others might disagree but I think that is how I would approach it.
