Not gonna happen. Cee is a virgin girl with a small dick that she barely understands. If there is something she will put to use, it will be her butthole (at least at the beginning). Anon will probe that tight little ass tirelessly before Cee has any action with her little dick.
It would be cool if Cee explains to Suzie and Anon she can't get a full erection because she has low T. Then in order to help Cee come out of her shell and make her feel good

, Suzie pushes Anon to have sex with Cee (and as it excites Suzie as well she decides to watch them

). Cee will then realize that her cock can become extremely hard while she is being penetrated, and being watched by Suzie make her hard as a rock

. Here is the hook to the threesome between Anon x Cee x Suzie... Suzie's desire for cock is so high that she can't stop looking on Cee's hard cock bouncing while she is being impaled by Anon. Suzie decides to join them (if the player choose to do so), touching and then sucking Cee's cock while she is being penetrated, and later Suzie can ride Cee in a train, why not