Ok I need to vent

I found out today my sister was being groomed or well attempted i guess because she came to me as soon as he started getting weird . by a family friend in his fucking 40s. Sorted that all out now , police informed ect . But his dickhead girlfriend came round to see the messages and tries to say "its all the coke hes doing he isnt a pedo " ... had to stop that dead in its tracks . Ive done alot of drugs and you know what none of them have made me want to do? Talk to a fucking minor. Like what the fuck kind of fucked up excuse .