Struggling to get back from the lie

My Wife asked me when I was going to tell her about penalties I got (I got them on February). I told that I wanted to hide them and pay by myself. Well, it showed my earlier lie. But this time I told truth. Better than lying. I could easily make somthing like ,,I was trying but"... or ,,I forgot..." or anything else like this. I didn't. Did what was right.She's so angry on me. But doing right gives me (very little) relief. I know I can overcome this. I can finally stop lying. Just have to think about my every word. I became to self-confident that I won't lie anymore. I'm not that far. I can never feel that confident. I don't have to lie.