hopefully you have YOUR meds in a safe place ABF can't get to.....also be VERY careful of giving him access to your dad.....he's probably on some heavy duty meds - do NOT put it past your ABF to try and get his hands on some.
when my husband's dad passed away, his brother was staying at the parent's home, SUPPOSEDLY helping their mom out. NAH, he was just helping himself to the leftover fentanyl and other meds as if his dad had left them to him in his will.
right now your focus is correct. your parents need you.....i really hope you dad stays stable and continues to recover. life is precious and all too short. do not waste one minute of the time you have NOW to be with your mom and dad.