My sister has just called me in a highly distressed state.
Apparently, she has read an e-mail her partner sent to another woman wanting to meet her for BDSM purposes.
My sister tells me that he has long held a desire to be a "submissive slave" and that she has not fulfilled this "desire". I pass no judgement on his kink (as long as it's about consenting adults and all that), but am worried about his potentially adulterous behaviour.
He has sworn blind that he never intended to meet this "Mistress" but was only acting out a fantasy.
He seems a nice enough guy in other respects (OK, don't know what goes on behind closed doors) and I don't want them to split, but what do I advise her? Please help.