I would tread carefully with the working from home scene. One for social services, it is risky working from home with children living there, even if your sister can verify that they are cared for and away from bookings. SS can be very difficult regarding this type of profession. But also another risk is the client themselves, there are numerous warnings of guys going bad or weird on here, even the nice regulars can become assholes.
Trust me, I`ve been there nice guy went stalker on me after being a 3 year reg. Guys can be assholes and have a habit of just dropping by unannounced at all hours if they know its your place and also the risk of them finding personal details or even blackmail.
I dont mean to scare you, but you really should find another place to work consider outcalls, flatshares or hotels ASAP to be on the safe side. xxxx