David Bowie.

The time in Hogwarts was a little rough for him, but the presence of his children made it worth it. He started to miss them again the same moment they walked through the portal that led them back to Xuanghen.

And he returned immediately to his routine, work, work, work, loneliness. TiShan simply needs to be out at night, at least for a bit, he already does enough sacrifices to force himself to sleep at night and be awake during the day.
Returning to a totally empty apartment, every evening, in the darkness, gives him an overwhelmingly negative feeling. Which is what moves him to make, probably, the most reckless and crazy decision of his whole life.

(…)
With the absence of his younger children, he started to pay visits to Shiinden more often, as he has more free time.
He doesn't do anything particular, while there, but tends to visit many Houses. His 'favourite', as always, is the House of Scorpion and for the usual reason. He is probably the Knight who spent the most time in the cauldron.

(…)
It's around 21. He is alone, in the House of Fox, curled up on the couch in front of the fire. He is sobbing lightly, with his face hidden against his knees.
He is in girl form, wearing his usual, oversized manly clothes.
At this time, he is already pregnant, but he didn't tell anything to anyone. He did everything on his own and pulling out the truth from him won't be easy at all.