My Hair... Straightened

It's been 16 months since my BC, and I finally got enough nerve to have my sister (she's a licensed hairstylist) straighten my hair. OK so I can't explain HOW she did this and explain techniques, etc. I'm no hair stylist and I had a hard enough time straightening my own hair when I was relaxed, let alone natural. I'm just showing you my length thus far and that getting my hair relaxed is so unnecessary. My hair is fuller/thicker than when I was relaxed, and she got it just as straight as when I was relaxed. My sister blow-dried my hair (using warm, not hot, heat) using something by a brand called Rusk - it was an anti-frizz type of product. She also used Moroccan Oil. After blow drying she flat ironed it with her Chi iron. That's it. No hot combs here. She also used some type of heat protectant, but I didn't get the name. I got my hair done on Saturday 2/20. It's holding up well, but it has not been humid. I just wrap it at night and tie it up in a satin scarf. Comb it down in the morning. I will probably wash it at the end of the week, but I will see :) After this, I don't plan to straighten it again this year. That's the plan, but we shall see. I definitely want to be careful with the heat and limit it as much as possible.