Hi, my 21 yr old step-son has moved in with us (I bought the house before I met his father). He has a new gf who stays over 5/6 nights a week. Neither have jobs and just sit around my house all day using electricity/gas at an alarming rate. I have just told him he needs to ask prior permission if he wants guests and even then no more than a couple of times a week. I have also asked him to contribute a little towards the bills. Am I being unreasonable?