I'm not sure considering the type of game this is - I guess it may be made as the only good ending when the developer finally decide to end the game but i think there will either have a lot more updates before that happen or either there will be a sequel and if there is a sequel such a ending may happen when the sequel is finished too,otherwise i think like i sayed before they can marry and/or just move to another city to try escape from all bad things that happened to them here and that to be used as the start of the sequel from where the story will continue perhaps but of course it will probably happen they still was followed by more drama and bad stuff like for example Savannah happen to be pregnant and give a birth to black baby which happen to bring new problems for MC even if he was ok with that since there may happen other people to make fun of him and humiliate him that his wife did give birth to a black baby which probably means she is cheating on him...stuff like that

May be at her wedding she was once again been fucked by one or few black guys while MC was waiting for her or may be after the wedding while MC was gone for a bit or was too tired and fall asleep...or he watched her been fucked or gangbanged by one or few bbc infront of him just like watched her been fucked by Cana...
PS: Savannah is actually the oposite version of MC of how someone may become after what happened to him!
Both happened to lost one of their parents - Savannah lost her mother(she was actully been lied that her mother left her and her brother) while MC did lost his father and later find out his father was having a affair with Khalifa's mother; Savannah's brother suddenly stopped supporting her as he used to do in the past before their father told him about their mother cheated on him with a black guy and lied that he decapitated her - Savannah of course felt betrayed by hers brother in one way or another which more or less probaly was culminating for her changing and start acting as a bitch - MC was betrayed by his own mother who happen to enjoy fucking his bully behind his back who also happen to be the killer of his father but unlike Savannah MC didn't decide to put a strong wall against him so he will not let be hurt or betrayed again,instead he kept been like before because of which he happen to keep been humiliated and hurt again and again all the time,guys like Jamal bullying him without him be able to do anything and others making fun of him! Savannah decide to count on herself to achieve her goals by using the fact everyone likes how hot and sexy she is since no one is supporting her and everyone wants just to use her while MC is not even trying to find a way how to achieve his own goals and is always acting really emotional,insecure and weak - letting his bullies beat him,humiliate him,not been able to stand for what he wants and instead just accepting Savannah been fucked infront of him by a black guy since he loves her and don't wanna lost his chances with her if he refuses to her offer,not been able to confront Jamal and do anything about the fact he is fucking his mother...he didn't even kill that cop,instead Khalifa was the one who killed him,the only one MC killed was Monty and it did it like a real coward - by putting a drug in his drink hopping he will die after that. Like i say,they are the oposite of how someone who happen to be betrayed and lost a family member will act - probably because of that they happen to be able to somehow understand each other and have fun.