Uh, please point out in the Bible where it proclaims the wisdom of keeping such a secret from your wife.
Better yet, YOU prove why God is wrong.
Matthew 6
1 Take heed that ye do not your righteousness before men, to be seen of them: else ye have no reward with your Father who is in heaven.
2 When therefore thou doest alms, sound not a trumpet before thee, as the hypocrites do in the synagogues and in the streets, that they may have glory of men. Verily I say unto you, They have received their reward.
3 But when thou doest alms, let not thy left hand know what thy right hand doeth:
4 that thine alms may be in secret: and thy Father who seeth in secret shall recompense thee.
I don’t have to prove a negative.