Hi, not a Mum but helping to care for my youngest siblings, both are 15. My sister has been in a relationship and her boyfriend asked her for a topless picture. She refused and dumped him but this has really annoyed me. I think he's manipulative and is pressurising other girls to send him things. I want to message him and tell him the potential consequences of such actions. Am I being unreasonable or is he just a teenage boys? Please help.