Castle’s little girl may be growing up too fast for his liking.

Alexis (Molly Quinn) is going to be moving into her own apartment with Pi (Myko Oliver), according to TVGuide.com.

As many fans can guess, Castle isn’t going to immediately throw them a housewarming party.

"Castle does not respond well at all," Quinn tells TVGuide. "He's angry about it because he knows how [he himself has treated] women, but he's not the kind of parent who can say no."

Besides the fact that no one wants to see their little girl leave the nest at such a young age, there are a couple other reasons Castle may be opposed to this idea.

The first is that he simply isn’t a Pi fan. In addition to Pi’s executive decision to simply stay at the Castle residence, he also made papya steak. What’s a papaya steak? (No seriously, if you know please comment below and explain.)

The second reason is that the last time he let Alexis make a major life decision, like going to Paris, someone tried to kidnap her and sell her into slavery. Let’s hope she fares better with this decision.

While Alexis may be brining herself and Pi closer together, there’s a chance she could be tearing Castle and Beckett apart,

Quinn recently told EOnline she thinks there’s a possibility the impending nuptials may not be so impending—and it may all be because of her character.

Will “Caskett” every get married?

“Castle” airs Mondays, 10/9c on ABC,

RELATED ARTICLE: Castle Season 6 Spoilers: Beckett Returns to New York: But Not for the Reasons You Think