Marks that she would show with pride if the situation came. Robbie had clothing that could and would show off nearly every part of her body, there was no issue in her mind of showing the signs of passion that you have with someone.
With how he was gripping her hips to pull her back against him she knew she was going to have bruises but she couldn't think about that, no instead she focused on rubbing her clit. It didn't take much more of his thrusting and her rubbing for her walls to start spasming around him, tightening over and over again as she moaned out his name into the wall of the shower. Her hand against the wall was trying to keep her from falling but the vibrations flowing through her entire body weren't cooperating.