Married Bosses

I've recently just started working at this McDonald's and my manager is married to our other manager and they both work the same night shift with me so all night long while trying to take orders I'm constantly hearing them fuss at each other through the headset over-shattering the customer who I'm trying to hear. and by the end of the night one is off the clock sitting in the lobby doing nothing while the other is counting registers and doing waste and I'm literally cleaning the entire store by myself I'm new but I don't feel like this is fair especially when I'm having to bag orders and take money having to run to the back to get the money and then running up front two bag and hand out the order I'm getting no help from anyone and I don't know how to handle this situation.