I used to have this same problem with my husband and kids. While I'm sure they were scared of how I might react if they told me the truth (I was very inconsistent), I got twice as mad when I found out I'd been lied to. I mean, I had screaming fits. But it didn't change for many years, in fact it wasn't until I was diagnosed and medicated that they felt I wouldn't overreact if they told me something bad. We don't have a problem anymore, of course my kids are all grown now and sometimes they even tell me stuff they did when they were young that I didn't know about, and we just laugh over it. Like my 35-year-old daughter who got two minor-in-possession charges when she was 17 and 19. She was still living at home at the time and somehow she managed to hide it from me. I must have been totally oblivious.