I realize you don't want to hear any preaching, but it should be stated honesty in every aspect makes for a better relationship. So just tell your husband the truth how much this meant to you and you were concerned about his negative reaction so you did something 'stupid' and lied. Then tell him because honest and open communcation between the two of you is most important to you, you decided to tell him. But also suggest jointly to set up a budget for each of you to spend on items only the other individual cares about, and then in the future you or he can happily purchase items within the budget without having to get an okay. Hopefully, it will lead your husband to share some of his not disclosed expenditures as well.