I am hiding smoking from my wife is it wrong?

When we started dating, I quit smoking because she wasn't smoking and I was looking for a way out to quit. So I didn't match smoking with her, and whenever I mention smoking she doesn't like it. Lately, my work has been very stressful, so for about a month I started smoking only at work again but didn't tell her. Is it wrong?

I am hiding smoking from my wife is it wrong?
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