Hello and thank you for your question.
It sounds very likely that this other woman is married or otherwise attached, which is why she wanted to text only, so she could erase any evidence. This is very likely why she is not responding to your texts now that she is back home.
Since she said she only likes to correspond via text, I would not email her or call her. You can text her maybe one more time and ask her why she is not responding to you, or if she wants you to stop texting her. If she does not respond to that text, then I would stop altogether.
You would not be considered a stalker if you texted her just one more time, by the way.
I would try to forget about her. It was just a flirtation and one kiss, and she is more than likely attached and not available for any kind of relationship.
As for relationship counseling for you, that would depend on if you feel your primary relationship needs strengthening. If you two have agreed to an open relationship and are both okay with that, then if that works for you, that is only your business. If one of you however is not 100% okay with it, then yes relationship counseling would be a really good idea, or if there is anything else you might need to address.
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