I think Isabella is more lucky and very clever. At least she has a son. No matter marry or not is not important. She will have a lot of $$$ and maybe more freedom.
Ms. Tsui seems has a happy family but she is a 生仔 machine. She has 2 girls, still need to "work hard" for a son. Who knows how many more she needs to give birth to. I remember she has 開刀 two times, so it's very dangerous to have 3, 4th bb. Good luck. Besides, her husband is ........ 大滾友....