After the first day I told Matti to be honest and tell me if he didn't want to come the next day, but he said that despite being a lot of work it was fun, too. But he'll stick to his day-job as a musician than become a professional babysitter, I guess....
Jaakko had asked Matti if he has family. Matti lives by himself, but told Jaakko that he has his parents and siblings with their families. But Jaakko was worried and told Matti that he could come and live with us so he wouldn't have to be alone. Matti had asked Jaakko, if he should move to the guest house, but Jaakko had replied:"No, no, you can sleep upstairs with Mom and Dad. They have three pillows in their bed!"
In the evening Jaakko wanted to discuss this with me. He was still quite concerned that Matti lives alone and said that he really should move in with us. "But he can't live alone. What if he dies.....?" I tried to convince Jaakko that Matti won't be dying any time soon and he's apparently quite happy living by himself, but he's always welcome to come over for a visit, evening tea etc. I told this to Matti, too.