Husband texts/calls female coworker outside of work hours, conversation includes our personal family info, now lunch, I'm not happy, am I wrong?

Husband exchanged texts/ calls with female coworker outside of work.

She mostly asks for BS work help, with a heavy dose of flattery towards him. He agrees he shouldn't have allowed her to think he was available to her whenever, claims he didn't know how to get out of it.

She works in a different he offered to go over there and take her out to lunch, off site.

He's no real reason to be around her in my opinion. He never takes me, or the family to lunch, making it more sus. Thought's?

Husband texts/calls female coworker outside of work hours, conversation includes our personal family info, now lunch, I'm not happy, am I wrong?
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