Is this a weird way to respond when told your husband is cheating?

A guy at my work was bragging about cheating on his wife with a younger co-worker. He showed some of us in the office photos of them together and flirty text messages.

I hate cheaters so I sent his wife an anonymous email and told her everything I knew. She replied “Thanks!”

Is this a weird way to respond? She didn’t sound upset. If it was me I’d be furious lol.

Is this a weird way to respond when told your husband is cheating?
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