'You sure are particular about your lawn.' Granger remarked.
'I like to have a neatly trimmed lawn. It not only looks clean, but also keeps pesky critters from trying to hide in the grass.' Hetty replied, filling up the gas tank in the lawn mower.
'Smirk. You sound exactly like a closet psychopath.'
'Oh come on now. You actually think old people who prefer trimmed lawns are secret psychopaths?! And what about yourself, old man?!'
'I'm actually too busy or too uninterested to take care of mine most of the time. I usually get this nice guy from next door to do it for a good price.' Granger replied.
'Uh huh. And judging by how clean your lawn quality is, do you think he could be a closet psychopath a well?' Hetty asked.
Knowing that his silliness had been beat, Granger just smiled, smirked, and muttered 'She's too good.'
Endnote: I got this idea from an old Pearls Before Swine comic.