Dear Holly,Last weekend I was doing something I shouldn’t with an unknown gentleman in a nightclub toilet when we were unexpectedly interrupted by my sister-in-law. One minute we were dry riding to R-Kelly, the next, the door had flown open and she was standing there, aghast. Unfortunately, by the time I’d peeled my pants off the floor she had gone. The thing is, she’s not said anything to my husband yet, but I very much doubt she’s going to keep it a secret for long because she’s a vindictive cow. Have you got any suggestions for ensuring she keeps schtum, or should I just go ahead and garotte her with her own washing line?Agatha,Peterborough

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