How would you deal with this situation?

My wife and I argue back and forth about having another kid. I tell her let’s just wait like 1 more year (she’s only 29) so we can get our blended family all together and happy (3 kids already), and she insisted I didn’t want another one. That’s not the case at all. As stubborn as she is, she just stopped taking the pill. She threatened it before and I didn’t think she was serious because she told me she wouldn’t without letting me know. Well now she’s pregnant and I looked at her pill case. She hasn’t taken them in 2 weeks. I asked her “Well you told me if you stopped taking them, you would let me know.” She said “I only missed 1 and then took 2 the next morning” which is a flat out lie. I feel like if she can lie about that then it’s a huge betrayal of trust. Now I just feel she is totally dishonest and I can’t trust her with telling me the truth on anything. I feel betrayed. Even if emotions were ruling her head at the time, wouldn’t an honest woman own up to the fact that she quit taking them? Ladies would you lie to your husband like that if you knew you did things out of emotions rather than logic? Is this an acceptable lie? I just felt like if she was an honest woman she would own up to it. I just feel horrible now that I’m having a baby with a dishonest woman who would lie to me about something that big. Can I trust her anymore? What else would she lie about then? “Hey did you sleep with another guy?” “No I wasn’t kissing him, I was just cleaning some left over food from his face”. That’s how I feel at this point. Am I being too harsh in judging her?