Hey babe, I remember you mentioning that you'd stay with me even if I sucked another mans cock so I have a surprise for you.

I talk to you and makes lots of eye contact while I take another mans dick down my throat, and play with his balls. I tease you and ask you questions, like if you like watching me suck someone else dick.

How excited are you to see your girlfriend take his cum all over her? Trust me, I take all of it ;)