Leslie was staring through the window, still thinking about what happened earlier, until Mr Big started coughing, which caught her attention.

Leslie: "are you okay? It seems like-"

Mr. Big: "Leslie I'm fine! You don't have to keep worrying all the time, it's just a cough!"

Leslie: "you've been coughing all day, every day, for weeks."

Mr. Big: "dehydration."

Leslie: "you fainted the other day."

Mr. Big: "dehydration..!"

Leslie: "you kept complaining that your head hurt..?"

Mr. Big: "dehydration!"

Leslie: "you kept saying "honey, I think I'm dying"?"

Mr. Big: "dehydration."

Leslie (she sighs): "then would you like to get you some water?"

Mr. Big (he coughs slightly before speaking): "no, I'm not thirsty."

Leslie sighed again before she looks outside the window. Probably contemplating about another plan. (Since she and Mr Big were pretty much partners in crime at this point)