Her face when everypony knew that she seduced by Twilight Sparkle, and seduced Applejack, and Applejack seduced Rarity. (currently)

Rainbow Dash: GAAAAH! wakes up from her nightmare huff huff huff crying W-why I have those dreams? Still? Is that fact I need to end there?  
Nightmare Cuffsie: Bingo. evil laugh  
Rainbow Dash: gasps H-how long have you been here?  
Nightmare Cuffsie: Your whole dream. I mean. I created this. giggles  
Rainbow Dash: Oh you little piece of…!  
Nightmare Cuffsie: Huh?  
Rainbow Dash: Look. I have tomarrow Wonderbolts excersises! I haven’t got time for somepony like you!  
Nightmare Cuffsie: Oh. Let’s make a deal then. I will stop making those dreams if you will did a deal. Here’s a deal. You won’t tell Tiger about me. Or. In my imaginary jail you will end. Ok? Understand?  
Rainbow Dash: Yeah. I understand! Can I go back to my sleep?!  
Nightmare Cuffsie: Yes. Goodnight. fades away  
Rainbow Dash: What the…? Ok. That’s probably my another weird dream. So. falls asleep