What do I do about the lying?

I have a daughter (17) She has a boyfriend. They've been dating for 6 months. I asked her if she's had sex and she told me no. I trusted that and thanked her for keeping the relationship appropriate. Today I found condoms in her underwear drawer. I confronted her about it and she lied AGAIN saying they weren't hers. I kept interrogating her until she confessed. I am very hurt that she lied to me. Twice. It made me teary eyed.

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