when you have divorced your wives absolutely and they have completed their prescribed term then you should not prevent them from marrying their prospective husbands if they mutually agree to marry each other in a lawful way. you are enjoined not to commit such an offence if you sincerely believe in allah and the last day. it is most decent and pure for you to desist from this allah knows and you do not know.
وإذا طلقتم النساء فبلغن أجلهن فلا تعضلوهن أن ينكحن أزواجهن إذا تراضوا بينهم بالمعروف ذلك يوعظ به من كان منكم يؤمن بالله واليوم الآخر ذلكم أزكى لكم وأطهر والله يعلم وأنتم لا تعلمون