All and whatever will include getting/demanding the couple's submission toward me. Rules and regulations that will involve the wife being dedicated and sexually active with me as her lover/Master, and the cuck hubby being submissive toward her and myself. Also make him understand what his new-found role would entail of him seeing toward myself and the wife's upkeep.
I already have a draft of one. If a couple desires such, and as well want something else included in the agreement, that can be done as well.