TetherNet allows you to share your VPN connection easily through hotspot or USB tethering. With just a single click, you can get everyone to be in the same VPN network without any hassle. However, ROOT IS REQUIRED for the app to work.
Instructions: 1. Tether your internet first either by Wifi or USB and get all the other devices connected. If it is "Identifying..", wait until it is properly connected before continue. 2. Once it is connected, turn on your VPN. 3. After that, you may share your connection using TetherNet.
P/S: SuperSU might always popup a lot of things while you share the network. You can disable notification in the SuperSU app itself to hide those things.