Action- Denise can refuse and that's that. She can say "Sorry but I promised my mom I wouldn't drink until I'm 21" "Sorry, but I don't feel comfortable drinking, however I will be the designated driver if you'd like"
Thinking to herself- "I am the only one who can make this decision and I made a promise to myself I wouldn't drink or do drugs"
I'm sure you could come up with some other examples but I hope this helped!