When tethering from phone to tablet do I need to connect my phone and my tablet to a VPN with using

[pcslookout]

When tethering from phone to tablet do I need to connect my phone and my tablet to a VPN with using public wifi ?

Or just the device I am using at the moment ?

 

[pcslookout]

omg I am so stupid this won't be a issue if tethering.

I will being way too security minded. lol