The printer is trying to connect to the Internet through your laptop, perhaps to check for firmware upgrades.
See http://windows.microsoft.com/en-my/windows-8/metered-internet-connections-frequently-asked-questions how to enable that:
Swipe in from the right edge of the screen, tap Settings, and then tap Change PC settings. (If you're using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, click Settings, and then click Change PC settings.)
Tap or click PC and devices.
Tap or click Devices, and then tap or click the toggle under Download over metered connections.
Once you've finished downloading your devices updates, you can turn this setting off to avoid unexpected charges when you're on a metered network.