So the fiancee and her are eachother beards which is a common thing in countries where being gay is illegal. It is where you marry a friend so you stay under the radar. And the sister is jealous I think?
Spoiler
I dunt think so cuz according to the raw, the sister have a gf outside
I think the person meant the sister might be jealous because the brother might’ve been spoiled, not concerned, or the most likable when she had to earn what she wanted when they were teens
She's jealous cause of how carefree he was and how their parents treated him
Any spoilers on why the sister acts the way she does towards her brother?
I read some spoilers but they don't explain why the sister and 'fiancee' are pretending.