I can’t imagine Bree not focusing more on her child than on Roger if the situation calls for her to make a choice, and I also imagine that Roger might not be thrilled if he makes it back and discovers that Brianna held onto a jewel given to her by Bonnet, hidden in his tooth until Bree dropped the bombshell on the soon-to-be-hanged man that she was pregnant after being raped.
What if Roger is so altered by his experiences with the Mohawk that he rejects Brianna and can’t live with the fact that the child might belong to the man who raped her?