A positive (no matter how faint) is a positive the tests are not quantitative so no matter how dark or light it is definitely a positive. Try to be cautiously

She is DEFINITELY pregnant!!
I would definitely try to see a Dr asap just to make sure her progesterone is high enough to support the pregnancy!
Congrats mama!
BTW there is a gay and lesbian pregnancy board too. Alot of us that have already given birth are still hanging out there too.