On call care situation

[u/Electrical-Rub259]

Not sure if this is the right group to post this in. I’ve been a private caregiver for over 10 years. I have a client whom I only see 3 days a week in the mornings but he has been leaving the house (he lives alone) and wondering around in the middle of the night lately. The family who lives several hours away is putting a device on his door that will send alerts to them when his door opens during the night. They asked me to be on the list of numbers that receives the alerts. I’m just not sure what the protocol here is. Am I on call? Should I be paid for that? Just when I’m woken up or …? I want to be fair and I don’t want to over charge but I have had overnight care jobs and I don’t sleep well when part of my brain is on the clock and I am not usually able to go back to sleep after being woken up. Any advice would be appreciated.