Damn, he'll be watching the game too. Could always login before him then put my phone on dndI always thought it was one but did a search and got the following.
So you might be alright as long as he's not watching the game as well.
You can have up to 5 devices registered for Sky Go at any one time, and watch Sky Go on up to two devices (in addition to watching on your Sky or Sky Pod), but you'll no longer be able to stream the same channel simultaneously on those devices.
