There is no confirmation, but there is a screenshot of Nader wearing what appears to be a wedding band on his left ring finger in the Nader El Shamy thread.
DeeDee and Nader are by the laws of Quebec, in a common law marriage. I doubt that they actually bothered to be married en papier, but if they did indeed formalize their union, I suspect it was done to attempt to secure some type of status as far as his citizenship is concerned. I believe that he is terrified that if he is found guilty of the rape of Mae, he faces not only jail time, but he may be deported. Perhaps having a "wife" in Quebec would mitigate Canada sending the motherfucker back to the sandy shithole he came from.
Inshallah, both he and DeeDee get what they deserve.
eta: It also occurred to me that if that condo is in DeeDee's name only, perhaps formalizing their marriage would insure Nader inherits the condo if DeeDee dies. HOWEVER this is just me speculating, and I have ZERO idea how Quebec's inheritance laws work.