Bircat Ha-Mazon while Getting Divorced

Q: Should a man continue saying in Bircat Ha-Mazon: "Ha-Rachaman Hu Yevarech et Ishti" (May the Merciful One bless my wife) if they are in the process of getting divorced?
A: One can say "Plonit" (her name) or "Gerushati" (my divorcee). One is not obligated to recite all of the additions after the fourth blessings, although there is a custom to do so (Ha-Rav Shlomo Zalman Auerbach in Ve-Ten Beracha, p. 304). Therefore, one may say what he wants.