Realizing that Adam has already figured out her intentions, Gloria didn't think she needed to hide anything from him.
With all the things that Adam made her feel in these past few hours, she feels closer to Adam at this moment than to her own husband.
"So, will you tell your husband about it?" Adam asks.
"I'm not sure..." Gloria says.
There is a short pause before Adam speaks again. "Then why go through all this if you don't want to stick it to him? I say, do it," Adam suggests.
"You aren't kidding, right?" Gloria asks.
"Why would I? You want to get back at your cheating husband by cheating on him. Now that you have done it, how would you get your revenge if your husband doesn't know what you did?" Adam says.
"Should I really do it?" Gloria ponders out loud.
"You know what? Where's your phone?" Adam asks.
Gloria is confused by Adam's question, but she doesn't question him. She rolls to the side and grabs her phone from the nightstand and hands it over to him.