SEMC-003 A private sex date outside the shop after becoming close with a prostitute

A girl I often see at a box health shop. I frequently go there, and our conversations get heated up; eventually, we have actual sex, but I get too excited and immediately ejaculate. However, we've become quite comfortable with each other and exchanged contact information. Then, the first time, I treated her to a meal. We promised to meet again and had sex outside the shop. This time she was very satisfied, and our bodies were compatible. Later, she contacted me, and I thought it would be another outdoor direct sales sex, but it turned out to be private free sex. It seems like we might get serious.