Sink faucet turns on sink and shower? so confused?

[hbucher0920]

So my wife sent me a video of our bathroom. When she turns on the sink faucet water comes out the tub faucet also. Currently the sink does not have a hot line going to it due to addition of a 2nd bathroom and future remodel plans for this bathroom. Also, writing from memory so could be wrong, but I thought I had the valves turned off that go the shower/tub because the cold line had a very small leak, plus we no longer use that bathroom since we have added the 2nd one. What in the would cause this?

 

[Lou]

That sounds entertaining!

Have you got photos of where the sink and shower are?