especially if she is Jewish.

from my dad,

Mrs. Goldstein came to visit her son, Mordechei, for dinner, who lived with  a female roommate, Rachel.
During the course of the meal, his mother couldn't help but notice how
pretty Mordechei's roommate was. She had long been suspicious of a
relationship between the two, and this had only made her more curious.
Over the course of the evening, while watching the two interact, she started to wonder if there was more between Mordechei and his roommate than met the eye. Reading his mom's thoughts,  Mordechei volunteered, "I know what you must be thinking, but I assure you, Mom, Rachel and I are just roommates." About a week later, Rachel came to Mordechei saying, "Ever since your mother came to dinner, I've been unable to find the silver sugar bowl.   You don't suppose she took it, do you?"    "Well, I doubt it, but I'll email her, just
to be sure." Mordechei  replied.  
So he sat down and wrote:
Dear Mom,
I'm not saying that you 'did' take the sugar bowl from my house; I'm not saying that you 'did not' take it. But the fact remains that it has been
missing ever since you were here for dinner.
Love, Mordechei
Several days later,  Mordechei received a response email from his Mom which read:
Dear Son,
I'm not saying that you 'do' sleep with Rachel, and I'm not saying that you 'do not' sleep with her. But the fact remains that if she was sleeping in her OWN bed, she would have found the sugar bowl by now.
Love, Mom

--
Lawrence Sirovich
Director, Laboratory of Applied Mathematics
Chairman, Department of Biomathematics
Mt. Sinai School of Medicine
Box 1012
NYC 10029-6574