Watch What Happens When Mom Walks In On Her Teen Bodybuilder Son Flexing In A Thong

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 wet your appetite:

Someone please tell him to flex naked in his next video:

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  1. Tom Who on June 25, 2014

    I’m a new fan.

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