“Come now. Your mother and siblings are waiting for you downstairs.”

“Lady Ermengild has been kind enough to allow your visit this evening.” (straightforward) “But rest assured that if you were to do anything to place Lady Ermengild and her children in harm’s way, I am perfectly capable and will not hesitate to remove you from the estate myself.” 

[NOTE: Ermengild; pron. er-men-gil-de or ermen-guild]