Alimony in mutual consent divorce. How to obtain

Good day all, In case of a Mutual Consent Divorce, while both the parties i.e. husband & wife has agreed for an alimony of a specified one time amount to be paid to the wife by the husband, on a mutually agreed condition of evidential issue of the husband having "extra marital affairs"/ "adultery", will not be taken up to the court. Plz clarify following: 1. Whether, the alimony amount will be mentioned in the petition or in MOU (Memorandum of Understanding)..? 2. When to receive the alimony..? Could it be received at the time of petition, or only after cooling period of six months at the time of divorce before the judge..? 3. If the alimony is only to be received after six months of cooling period before the judge, and husband denies to pay the alimony, what are the legal options left with the wife..? Thank & Regards,