What do you think of this girl's action? Is she trying to flirt?

There's this married woman in my part time whatsapp group chat who is working under this guy who is arguably the better-looking ones among us.

As the job requires, each of us have to send a simple update of the day at the end of shift.

Today, this married woman sent her update and the guy gave a thumbs up reaction to acknowledge her message. She texted again to 'thank him for replying her instantly' which is weird cos not only was it not necessary, he also didn't really reply? It felt like she was trying to make it seem like he's interested in her or there's something going on between them?

Previously, she did something similar like pointing out that he liked her message so early in the morning and he merely replied that it's bcos he was doing morning exercise. She replied with an ambiguous emoji.

Her husband is in the same group chat too but it's like she still want to create the impression that she have something going on with the guy. Does it feel the same to you?

What do you think of this girl's action? Is she trying to flirt?
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