Ok, maybe jerk was a bit harsh. I guess we should be able to ask about anything.
You're asking if she is real, but what is it you're doubting? That she is a woman? Is there any reason to doubt that there are female members of the forum? If you look at the member register you will see there are lots of female members here. Or do you doubt that she is a mother? Many women become mothers, and sex lives and sex fantasies don't end when one becomes a parent. Or do you doubt that she likes the BFMM angle? Well, she found her way here and has registered as a member. So I can't see any reason to doubt that she likes what she sees here.
Why not take your fellow members at face value? If you see something you think is a fantasy join in the fantasy or steer clear, and let those who enjoy the fantasy have fun.
I don't want to derail this thread, so if you want to discuss more, maybe do it in a pm.