I just read the thread on Ginger - Hot Mom in which she is said to have a boyfriend. One of the posters tells of how she mentioned right at the start of the session that she was travelling with him!
OK, chaps, listen up. I have heard this more than once. One lady claimed the he was "right next door" in the same hotel on the same floor and yet proceeded to do "everything but" with me and would probably have included the "but" as well if I had made an appropriate offer. Another one told me that her bf was with the Hell's Angels, San Francisco chapter and yet did not see the slightest issue with me sucking her off. So, it stands to reason that you do not always need to take the bf yarn at face value. It is, at least occasionally, a defensive strategy.
These ladies must have their share of bad experiences with our kind of hobbyist and this is one way of warning the client not to push his luck.
Needless to say that they shouldn't need this device to feel safe around us. So, keep your pants on unless *she* tears them off of you!