19-year-old YouTube bodybuilder, Kieran “Flex” Billen, loves showing off his incredible physique to his millions of anonymous YouTube viewers.
The London teen was in the middle of filming a new “flex” video when his ‘mum’ barged into his room, catching her son flexing in a speedo with the camera rolling.
Watch what happened next below:
Here are a few more videos of Kieran to whet your appetite:
