Join the twins shower!

You decide to pop in on the twins. When you finish undressing, you follow the footsteps of the twins and make it to the first shower on the left. You peek in, the smaller dicked twin is on her knees, the other twins hard cock in her mouth. God! That is a monster cock! It was the twelve inches you guessed, but it was also twice as thick as yours! You walk in and say seductively, "That looks like fun. Mind if I join?"
The blonde girls look at me, one still with cock in her mouth. The larger one smiled at you while eying your naked body.
"Sure." she purrs, "Hop in where ever you want. By the way, you should know my name is Anna, your going to be screaming it soon." she smiles and focuses back to her sister. You go to where you feel is best for you, which is...