Babysitter

Ok so I need input. I'm overprotective I know that. But i also live in a bad area. My babysitter has covid. I'm currently off work at the moment trying to find someone to watch my 1 yr old overnights. Basically my family won't or they have some really questionable excuses. My 13 yr old sister is extremely responsible and she sometimes watches him for an hr or two by herself while im at the laundromat. She can watch him most of the time. I'm a little concerned though. I have a 15 yr old brother hes pretty responsible too. I need to go back to work i couldn't afford to lose my job. So what do you all think would you leave a responsoble 13 and 15 yr old to watch a 1 yr old baby overnight? They have watched him many times before and I work 5 mins away. Please leave input thanks.