Mrs. Ford’s wrongful move
If I were Mrs. Ford I would have never planned that revenge against Falstaff. Instead to make herself look trustworthy in front of her husband, she should have handed the letter to him. The revenge that Mrs. Page and Mrs. Ford have planned should be carried by Page because her marriage is more successful and her husband trusts her most. This would bring a lot of trouble to Mrs. Ford’s life. This plan would feed on Mr. Ford’s jealousy rather than she proving her husband that she is a trustworthy wife.