Maybe? If the MC has a chance to hook up with Anna again while Evelyn isn't there. This time around it's because she gets super horny while hooking up with Evelyn that she even allows the MC to do anything to her because she is very much a lesbian... until she isn't. Even Anna was amazed that she let it happen. Wouldn't be surprised if the pheromones played a big part in it. It will depend on what the dev does with it, but nothing has been said one way or another as far as I know.
On the topic of Arwen, does she have a power? Is that ever discussed? I'm wondering if the scene at the end is an evolution of Evelyn's power or if it's something the MC picked up from Arwen. We know Anna's power, and Sapphire's power. Lucia didn't get any this time. And he has Evelyn's.