Thanks for letting me know where it is. Sad it isn't another proper scene though, Couldn't figure out what the Dildo was for, now I know. Will add to the list.
I think now people just need to figure out what the secret red keycard in the last area is for and if its another scene.
Oh damn yeah I forgot about that one!
There are two card scenes I forgot about. I don't know if both are in v1.0, I am a subscriber so I have v1.1b
Once you have both the yellow and red cards that can be found in the game and you finished the game (not sure if it unlocks immediately or if you have to finish a full run after collecting both cards), you go back to main menu and click on the author's name in bottom right "RayAbby"
This takes you to a door with a keypad and a keycard scanner. Just click on keycard scanner and it gives you choice between yellow or red card. It is repeatable so you can see both without issue
Yellow card gives a scene from male POV with Ada Wong, she will masturbate the POV character and then give footjob and then shoot him and this then quits the game
Red card gives a scene again from male POV with Ada, Ada will first give a dubcon blowjob and afterwards the male character will want more and rape Ada
Both are very short scenes and just kind of bonus secret content