Tip of the day if you can't get her LIGHTS OFF or drunk stupid. Use small fingernail scissors or raiser to slice open center front of condom. Slide the tip of the condom out and with scissors cut it clear off. Put it on without her seeing u or practice to put it on so it does not roll up your dick (yet). Then as you fuck her it will roll up your dick with out her knowing. Cum Deep in her and poll out. Cum the rest on her somewhere else or in your hand and take the condom off without her seeing. Distract her. Hand masterbate her I have done it with cum on my hand mixing with her fluids and she had no clue. Get her to Organism.
Or go straight to the bathroom or go to the bathroom after she organism. Then flush the condom (evidence away). Never see her again. Leave. When you can
Always best to get her LIT stupid out of it. You know what I mean.