I was really disappointed, unfortunately. I usually like the actress and the actors and I think they would be great if the movie was a different one.
First of all, where is the thriller? There is nothing really scary. There is no crime or thriller really hooking you. Yes, some things are in the unknown but for what? What's worth continuing to watch it? What for? Where is this going? Also, the link to the characters is too weak so that you want to continue watching because of them. Give your audience some better teasers.
Second of all, they jump right into eroticism but don't give eroticism time to build up in the first place. And then it's just randomly placed all over without any content.
Talking about great sex - I feel like the author did not understand eroticism at all. The story before and the chemistry and attraction is way too thin based on the story. I mean, yes, you can meet someone for the first time and it can be a one-night-stand with a lot of attraction but there needs to be some kind of bond. The actors don't play it badly but it's just badly written. It needs more time or more story to build up. It's like the author watched too much (bad) porn... and then on top of it, misses out on all of the thriller. I can recommend reading studies on the ingredients to great sex (e.g. Cited in "ist das normal" by Melanie Büttner or a research study by Peggy Kleinplatz)
Also, I feel sorry because a good actress has been misused for a porn movie.
I have been very excited about it and it's just so sad.
Still hope that Lena Meckel can show what she can one day in another movie. I guess she could be a good actress if you give her a different plot with more text and depth. The movie is just not catching at all.