At least Jiren didn't keep his illness from is twin sister, he was able to get the surgery he needed with his twin and brother-in-law by his side, though I think he should still tell Meili about his condition.
I hopу he will get better soon. But I really don't like that Meili can not notice that he's ill. she lived with him for at least 1.5 years now. Even if they are not that close I really find it unbelievable