^ Basically, Sana/Gardevoir was offended by Erl/Eru/Gallade poking her chest and thinking she was wearing a Nu-Bra. Honestly, I'd be curious about the thing too, but evidently Sana wasn't accepting this.
It's the fact that his first reaction to her complete transformation was "what the heck is that" rather than "omg you're gorgeous."
Mega Evolution!
Your wife went back to her parents' place?.... Yewsh......Wai Dobn knowWell?
I'm cute am I not~I stuck with it, and finally Mega Evolved!This thing's attached to your chest!
What's it?Ehehe...Ahaha!A Nu-bra?Why...