Girls, Does this girl at my gym like me or my brother?

So I need some help figuring this out. My brother and I go to the gym together every day after work. A couple days ago this girl started showing up around the same time. Over the last couple days I’ve caught her looking at us. I wouldn’t assume if I wasn’t sure either. For example today she was on a machine where we were behind her left shoulder about 20ft away and I caught her turning about 120 degrees to look right at us (the opposite side she would have been turning if she was increasing the weight or something) twice in maybe 3-4 minutes. This was only one of several times today.

What I need help with is how do we figure out who she’s looking at? We both find her attractive. Should one of us just ask her? If so how?

Girls, Does this girl at my gym like me or my brother?
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