Buy a new laptop and keep it in your vehicle.. I assume she doens't go in there...
You want to protect your therapy related info and your affair-busting info, but at the same time you don't want her to think you are keeping secrets that are to her detriment either.
If she KNOWS you are KEEPINg things from her she will ASSUME the WORST right now... and you are NOT setting an example this way.. SHE can now lock up whatever she likes and YOU are a sitting DUCK for it... you have NO position to challenger since YOU are doing the same thing
Well, from her perspective anyways. I DO realise there is an important difference between keeping secrets TO SAVE a marriage and keeping secrets to DESTROY a marriage.