KimcheeLover

Seriously! No need for enemies, if you got a grandma like that!

Yes to your first question. The BIL thought he could raise his rank by marrying the princess (and maybe get a son too while he is at it). Hence he wanted to get rid of his wife. That ***.

As to what the princess got out of this. As far as I remember that was just her being her usual condescending, arrogant self trying to hurt the FL through her sister. To clean up the mess the princess caused by this (getting publicly entangled with the BIL), her mother, the Princess Royal killed his entire family.
And now I'm celebrating with an evil grin that she didn't succeed completely and it's come biting her back in her royal behind 😈

For real. Now I even doubt her "sacrifice" for the emperor, where she supposedly saved his life. I wouldn't be surprised, if she staged that too to keep his trust and favour.
And her "support" of the crown prince too. Those walnuts? She probably had them added herself, blamed it on Concubine Xian, and played the noble saviour in front of everyone. Three flies with one stone: gain the Crown Prince's trust, estrange him from other potentially powerful figures in the palace (Concubine Xian), and make said potential threat to her power loose points in front of the emperor. Well played, Princess Royal.

Trust really is a funny thing. If you see someone act with a hidden agenda once, you start questioning all their actions...

I haven't even thought of that yet, but true... how sad for her...
And for the crown prince too. He doesn't even realise he's just a chess piece in the Princess Royal's game of power...
Or maybe that's it? Rather than spineless, he is just too naive still...?
But I haven't seen the spoilers, so you probably know more than me. I "try" to stay away from tem XD

I bet the Princess Royal killed the former empress (the one, the emperor loved) too. If she was Jiang Si's role model, she probably was like her, compassionate but strong. So, she would not have tolerated the Princess Royal's schemes. Having the emperor's favour on top of that, she threatened the Princess Royal's position as the emperor's "most treasured woman in the palace" and thus her power. Thus, she had to go. The current empress is probably but a puppet of the Princess Royal.
Can't wait for Jiang Si and Yu Jin to uncover that and bring the Princess Royal to justice!

I'm loving the comedy too, such a fresh breath of air!

I have yet to watch JOL, so I can't say anything about that. But for me, GODF reminds me of Ever Night, if anyting... (another masterpiece btw)

I'm the alien - so fitting haha
and also the undercover-martial-arts-etc.
a guy twice, lol