[Maltloaf]

You could potentially do it remotely with screen sharing and time restricting the Mac address of the device at a given time. You would need his farther to log into the router using the routers IP address and you guide him by screen sharing.

---------- Post added at 14:09 ---------- Previous post was at 14:06 ----------

Or just unplug the router and lock it in the car if you want a quick fix.