Shoot her

This time, you're able to watch the changes... Well, you would be able to if they didn't happen the instant you pulled the trigger. No beam, no sound, no anything. One second there's a small chested blonde standing in her cheerleader uniform, the next there's a black haired girl with ear piercings, eye piercings, a nose piercing and lip piercings dressed all in black.

Seemingly sensing your stare, Elena looks up and says "What are you looking at, Dweeb?"

You stare at her, 'It seems that not all of the settings make them have sex, should have seen it coming, but we'll fix this.' you think. You flick the left dial letting fate decide what happens to Elena.