Secret threatens marriage

I find myslef in a dilemma and would dearly appreciate your advice in this matter. I shoudl forwarn you that this may seem like a matter
below the dignity of some but please hear me out. I am a happily married man for almost 10 years with 3 children. I have never been unfaithful to my wife and I love her dearly. I have had a troubled childhood with details I never wish to discuss which I have not
shared with my wife. I have been involved in dispicable acts for a long time. Since my early years as far as I can remember I have indulged in wearing female underwear and clothing for arousal and masturbating. I continued this act for a long time even into my marriage years and funnily though have never used my wife's attire. I have stopped
these acts for many years and have devoted myself to religion and family. However it seems that someone else has found out about my sick act and I am afriad that they will approach my wife and destroy our marriage. This person being a family member from whom I am guilty of taking her personal items. Now I know I have no one else but myslef to blame but I do not wish to hurt my wife and I already fear the punishment in wait for me from God. Should I tell
my wife now and avoid her finding out some other way or leave it be? I have not confronted this other person and neither has she talked to me about it except hinting in our presence about men who
do these things. I have spoken to a psychologist who suggests I wait a while. Please advise.
John

Everybody has done sexual things that they are not proud of and would not talk about at a dinner party. Do not talk about this to your wife, unless you have to, as it might disturb your relation. According to Christian belief, God will not punish you, if you ask him for forgiveness.