Perhaps the vow should include; ” do you, Brian agree to have sex with Edith and Edith only, until you drop dead, unless she dies first, and if she’s pissed at you, and refuses to have sex with you, in which case you agree that you will have no sex whatsoever, for whatever time period Edith specifies, completely at her discretion, other than with yourself, of course, but in any event discreetly, for as long as it takes for edith to momentarily suspend her disgust with you ling enough to engage in intercourse, and to in any event not have sex with anyone employed in the household under any circumstances, even if you haven’t gotten laid in like a year.