He probably has sort of mind trick he has that only he understands. Because it's Lelouch.

[He wraps his arms around her for a moment as he catches her, before lowing her to the ground, making sure she's steady before letting go.

At her question, he gives a half-hearted shrug.]

We were supposed to be married, arranged marriage after all. It didn't work out with Britannia invading and my joining the military. After that, what was left of the Kururugi/Sumeragi family pretty much disowned me.