To the OP:
To relay an experience I had with a SA model...
A few years ago, I fell for a SA model who seemed to push all the right buttons and touched all the right places of my heart. We exchanged numbers, texted and called each other at least weekly, both on the phone, and on Skype. I began sending her money via WU after she sent me pics of her two kids. This went on for about a year...that is, until she screwed up....
The last time I sent her money via WU, she contacted me on Skype and sent pics depicting her actually signing her son up for soccer lessons using the money I sent. A couple of weeks later she sent a pic of this same son dressed in a soccer uniform....but in the pic, he was noticeably bigger and taller than the previous pic sent only a couple of weeks earlier. Way bigger than a two week growth spurt would ever be able to explain. When I challenged her about this, she went silent. No more contact, no goodbyes, or thank you's for what I had done. Lesson learned.
Since then, I have found out that a LOT of SA studios actually coach their models in the various methods of catching(or at least hooking) the "big fish". I also learned that even if you send a model money using WU(not sure about other methods), their studios(or bosses) are given a substantial cut of what you send, and the model can be put in serious jeopardy if she doesn't.
Since then, I only use the actual site's method of tipping as a means to support my favorite models, and If a model requests an off-site payment for a sick relative, kid or whatever, I'm gone in an instant. Supporting a model through the mechanisms of the site in question is the safest way to keep the relationship real and somewhat transparent. That, and I'm no longer looking for love in all the wrong places. =)
I suspect you have your suspicions about the nature of this relationship, or you wouldn't be posting about it here on this forum. There are ways to uncover the truth about your particular situation. Some are more covert than others, it just depends on how quickly you want to find out her true intentions and purpose. I won't make any suggestions other than to say: Good Luck!