If your husband has manipulative and controlling tendencies then most probably what he is doing right now is just another mind game of his. He will attack your kindness and vulnerability and use them to his advantage to control you yet again. Narcissists hate it when they lose power over someone and only discard their victims when they have found someone else to control and break. You are under no obligation to care for him since you have filed for divorce and are separated from him. However, if you think that you are now very clear about your boundaries and nothing will change your mind then you can be the bigger person here and look after him simply out of generosity.
Hope this helps. More power to you!