Why do some married women so flirty?

One woman in the work (she is married) she is talking so seductive sometimes, for example last time I ask for chewing gum from friends, she answered, she said I have but second hand (she showed her mouth), I don't want to think sexual about her but she is talking everytime like that, also more seductive and that's making me think sexual about her...

Why do some married women so flirty?
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