My best friend's mom offered to buy my plane ticket?

I recently moved from Texas to North Carolina. I am about to start college in the fall in NC, but this summer I would like to see everyone in TX again. I moved here because my mom is...well...a little off mentally. Now I live with my dad, but he does not want me back in TX right before college starts because of my mom's abusive nature. My friend really misses me as I do her and we both want to see each other again. I also have no fun trips planned and I would really like to do something as a big finish (so on July 5 we would be going to Warped Tou in Dallas). The problem arises because even though I just got a job, I do not have $300 saved for a plane ticket. Her mom offered to buy me one and is being adamant about doing so. I don't feel right about accepting the offer. What would you do?