Question about studio setup

Okay so I was trying to get a shot of me and my wife against a black background and I had to add a seperation/hair light so it wouldnt look so flat but I keep getting spill from the hair light onto my wifes face. Is there a way to avaoid this? I had the main light on camera right with a refloctor on the left for fill and the hair light was in the back camera left. Would it be better if I could get a boom and put the hair light behind us?

If there is anything else you notice let me know.

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Using a boom arm, careful positioning the light to subject, and some diffusion on the hairlight all help. BTW, I like that cross light effect, I think the back light power just needs to be turned down a bit.

You might try turning the hair light away, so that it just scims the hair, instead of pointing it directly at her.

I always turn off all my other lights, including the room lights, so that I can see the effects of the hair light better.

hmmm. I guess I could try that. Do you use a honeycomb? If I dont use one I get problems with light spilling all over the place since I dont have much room to work with in my studio.
Is there a standard location for the hair light? is it usually on the main light side, middle, or fill side?

I don't use a grid on the hair light. Although, I have seen them used. I guess that is your choice. The grids would give you a more concentrated light source, allowing for the placement to be more directly overhead without spilling onto the front of the face.
I just turn mine down low, without grids.

I have used and seen, the hair light either directly above and behind the model on a boom, or opposite the key light.

There are plenty of folks on here with more experience than I have, hopefully they will chime in here.

Actually there are (of course) several ways to take care of this. One is cinefoil. Basically aluminum foil that is flat black and thcik so that it can be shaped just about any way.

The best answer short of barn doors is a scrim or flag. Scrims have holes in them of various shapes to control where the light falls. Flags are just that, usually made of cinefoil, foamcore, wood etc. Take a piece of 3'x2' foamcore and place in onto a lightweight light stand with gaffers tape so that you can block spme of the light coming from the hairlight but still allow for the hair to be lit like you want.