What will I do with you, Mum?

My sister had the flu, and went outside to check on 3 year old Alec (her little'un) pottering in the garden with his grandmother. Alec looks at my sis in shock and goes "Mummy! you're to go inside. You're NOT to come outside, you'll get sick and throw up, and then what will I do with you? GO INSIDE NOW". and he points. and frowns.