Maybe pay the "lesbian" extra if they can tease/seduce the "straightgirl" to go explicit/do more then just the basics/minimum.

Create a minimum (if there isn't one) to attract new/inexperienced/cheaper, but still hot models (like say minimum =kissing, belly-to-belly hugging and caressing of breasts and butt, also minimum topless offcourse). Then put one of those new girls with an experienced model and let them/her do her thing. It will, most likely, be slow and akward in the beginning, but if they have enough chemistry, the experienced model should be able to tease/seduce her into doing more. The passion that comes from that would be so hot.

PS is this forum dead? No new post in over 6 months. What about the website itselve?