Jiang Cheng being born with a curse of love, of undying loyalty, cursed to have a physical reaction to separation and abandonment from those he has a deep bond with - something his parents find out after he falls gravely ill from devastation after his beloved dogs are given away.

Shit man this probably means JC dies after his parents perish

Wei Wuxian is attended to by servants when the Lord and Lady of Lotus Pier are consumed with anxiety for their young son, lying unmoving under his blankets. His breaths pain him and hurt to hear, feeble, wheezing gasps that Yu Ziyuan fears will eventually fade into silence.

The Violet Spider instinctively coats her desperation with anger, first scolding her son when he first falls sick, then, as he deteriorates rapidly, screams at the healers who cannot help him. Pride melts away in the presence of impeding loss as she begs fate to spare her son,