Not necessarily, many times Israelites went whoring after other gods. I see it as a simple thing as she was one of the ones who practiced the pagan customs of the land as it's what she grew up in.

I could be wrong in that. She may have just been another adamite. The relevant point being she was not Moabite by blood is the main point to drive home there. As most pastors claim she was Moabite by descent.