細叔 is financially ok wor. He has annual income of $300,000. With his wife not working, he does not have to pay tax or just a little bit. All is his NET. He must have saved a lot - free accommdation, meal subsidized by 99 who is financed by the elder son.
細叔 has taken everything for granted. He is far less mature than being a father. What his wife did so far was silently endorsed by him - wanted to get more. He even thought 樓主老公 owed him, by giving face to deceased 62. Once 62 passed away, 樓主老公 has to take the responsibility.
I bet 細叔 and 二嫂 had blackmouthed 樓主 and 老公 a lot in front of 99. Otherwise, 樓主99 won't think 樓主小产 because of 樓主 didn't want to give birth of her grandchild for career sake. 二嫂 is jealous of 樓主's career achievement and hence indoctrinated 99 that she was willing to sacrify by giving birth to 99's grandchild. If 細叔 does not endrose what his wife did, he would have said something in favour of 樓主 and 老公, rather than letting 99 thinks so extreme.
Why 細叔 always argued he is not earning much. In fact, his earning is well enough for supporting a family, without housing expenses.
細叔 considers 樓主老公 as brother because of his financial benefits. If he really considers 樓主老公 as brother, he would not ask 樓主老公 to continue the financial support - 樓主老公 has his own family already. He should have felt guilty of what his wife did.