Welcome to Psych Central, Kaykay,  Here are links to 3 articles that may be of interest, from Psych Central's archives, on the subject of secrets & lies in relationships:
Secrets, Lies and Relationships | Healing Together for Couples
The Impact of Secrets and Lies in a Relationship: A Closer Look | Healing Together for Couples
The Cost of Secrets and Lies
I hope you find PC to be of benefit. 
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"I may be older but I am not wise / I'm still a child's grown-up disguise / and I never can tell you what you want to know / You will find out as you go." (from: "A Nightengale's Lullaby" - Julie Last)
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