Question about pregnancy

So today at work a lady came by a pregnancy test. She was a lesbian and said that her and the wife hadn't done things in years. My question is she came back with a positive test to ask me if it was right. The test was very dark and positive. She says it can't be we haven't done anything in years. I know two women can't make a baby so...

Is she lieing about ivf

Had sex with a guy

Something wrong

Or

Faulty test

In shock

What do y'all think