Hold That Thought

When Killian asked if he could bring a girlfriend home for spring break, Deirdre was definitely pleased. The redhead seemed nice at first, but soon her interactions with Killian shrunk to monosyllables.
"I've no idea why she looks so... Worried? Pissed? All the time," he told his brother over beer.
"Might be her cycle."
"Definitely not, but... you don't thing she could have a... bun in the oven?" Killian looked scared.
"Given how prickly she is, it might be a hedgehog," Philip joked.
He stopped laughing when it turned out she was just more attracted to him since they met.