so aboute Renee route, here my view on that. Renee is a crime Boss, there no Good Route or Redemption Arc with her, since she basic hate males and love to break males, from the start you need to give a reason for her to keep you around, my sugestion is that she find you usefull, maybe as some type of spy, Futas normally dont care if males are hearing things, since they normally are not smart enough to undestand the information, so a male that can work as spy and is smart enough to undestand the important information can be useful for Renee against some enemy or to help in some big plan of her. so she will keep you around until you are no longer useful.
about the endings, i can see 4 options.
A:you fail to make any real connection with Renee during the route, and once she dont need you anymore is time to break you.
B:you try to play the paragon route mr nice guy and try change Renee, maybe help her with her daughters, but in the end fail to change her, and she bind you in the end, but you bond enough that she decide to keep you as a pet.
C:you try to double cross Renee, maybe helping her enemy, but she find out and make you pay for that.
D:you play the Renegate Route, you go 100% supportive of Renee as a crime Boss, and help her to have sucess in her plan, and also bond with her, in the end Renee fall in love with you and decide that you are too useful to become a pet, she make you her right hand man and partner in crime.
since Renee really dont trust males, you need to go big with her to get her love, like taking a bullet for her or something like that, she will also probably put multiple testing situations to see if you are loyal.