Hi first time poster here x my son aged 11 has made a friend that lives very close by and they are becoming great friends gaming etc but the young boy has starting bringing his younger sister over to play which I thought ok that's nice maybe she can play with my daughter but nope she just moans screams threatens to walk out the house and go home and get her brother in trouble she doesn't play very well at all but I try and encourage her to play and I talk to her and let her play with my hobby stuff etc but she's so draining she's very hard work but the mum won't let her son come round without his sister now I don't know what to do x