Q: Wow, don't you think my sister/best friend looks smokin' hot tonight?

Stop right there, that's a trick question! Simply because there almost isn't any answer that's appropriate. Not to your lady love anyway. Now pay close attention to our solution because your choice of word is positively critical over here. You can say that they look 'pretty' or 'cute' even preferably only for that night, but never agree that they're hot.

That particular word instantly puts insecurities of a bizarre nature into your girlfriend's ind and it will have her convinced that you're going to attempt to bone her sister or friend the second she isn't looking your way. Hey, we don't make the rules we're just telling it like it is!