This Charming Man, by Marian Keyes (2008, London)

Dublin. Lola is a nice, good stylist who reads on newspapers her boyfriend, the New Ireland politician, Paddy De Courcy, is about to marry another woman. Alicia is the not totally aware Paddy's wife to be. Grace is a beautiful journalist in love with Damien but, in a way, involved in Paddy's story ...and her twin sister's one of Paddy's exes. Marnie, Grace's twin sister, living in London, married, two daughters, Paddy's ex, is so fragile she can barely survive day by day. All the Paddy's women share a secret about him... Turn-pager.