External screens and loss of inputs

I have a project where a VR must be used, the problem is that I need one screen to be shown on the PC screen and a different one on the VR screen.
For example: A game that is 2 players. Player 1-play with mouse and pc monitor.
Player 2-play with keyboard and VR.
What I have achieved is to use an external windows to show what player 1 should see. The problem with this is that in external windows, when you click a button or something with the mouse, the other player loses control over the game.
I use Blueprints to program.
For now I do not handle C ++