[Gretchen immediately gives an impulsive smile, making a sound that's flattered - maybe even a little embarrassed? - at being complimented like that.]

Oh. Thank you!

[And then after a second she realizes what she's doing and tries to stop acting so flustered.]

I mean -- that means a lot to me, to hear you say that. Coming from someone as obviously pretty as you!

[Above all else Gretchen lives to flatter her Queen Bee. And Irene definitely gives off some serious Queen Bee grade vibes.]