SPOILER ENDING OF GLENN AND ROSALITE..
They break off their contract marriage after Glenn becomes a Baron at the end of the novel, since Rosalite doesn't need to protect his mother and sister anymore because he can protect them himself. But they get re-married because they genuinely love each other (Glenn cried when Rosalite ripped up the first marriage contract because he still wanted to stay by her side), and they have three sons together.
SWORD AND THE TIME LOOP SPOILER
The sword Rosalite found in the basement of the Roxburgh dukedom belonged to the OG Rosalite BEFORE MC transmigrated into her body. The sword told MC that OG Rosalite made a wish with this sword, which was to make Asterion's wish come true no matter what. MC then learns that Asterion is a HUGE SISCON, which means his OG wish is to have MC all to himself and live with her forever, but he keeps dying because either A: the OG novel's MLs get jealous easily (in one loop he hugs his sister and gets killed by a jealous Luke for hugging her instead of him) so they kill him; or B : he gets upset (either when MC ignores him when he's older or because he gets assaulted by an ML) and offs himself, so this restarts the timeline every time since his wish did not come true.
LAST CHAPTER SPOILER
The FL passed all the rest flags and finally she could rest in peace, Glenn acquires the title of Baron so he doesn't has to have Rossie's protection for staying safe. That's why she decides to free him from the marriage contract.
Rossie and Glenn meets alone in the Oval office to talk about the marriage contract and FL tells him that now he no longer need her protection because he had been able to protect his family and their fortune, so no one could ignore him anymore, besides his uncle supported him. That said, she shredded the their fake marriage contract.
Rossie planned to propose him making a new marriage contract because she wanted to stay with him, but he interrupts her before her proposal and starts crying.
The FL went crazy because she thought that Glenn hates having to live with her in the future so bad to the point of crying that way. But she was determined to fight for him, so she makes up her mind and gets up from her place to pats him on the arms as it was written in the Roxburgh manual to confort people.
Glenn wouldn't stop crying and FL begins to apologize and she tells him that he could be more selfish, but no matter how much he objected, she wanted to ...
Before she couldn't end her phrase, Glenn interrupted her again and tells her that he doesn't care about anything of what she was saying, he just wanted to stay by her side and then confessed her that he loves her.
FL froze for a moment because she didn't expect been reciprocated and then she replies "Uh ... uh .. yes, I love you too", Glenn looks at her incredulously and blushes even more in contrast to his eyes that were already red from crying so much. The FL thought that he looked like a cute bunny and with this thought in mind she kissed him and wiped his tears.
Fragment of the novel:
"Listen to people until they finish talking. I was going to ask you if you still wanted to continue our marriage even without the contract."
'Yes?'
"I'd like to officially propose. Please, go out with me. No on second thought. Let's live together."
Ophelia Lanny
After he confessed his love, she did the same and they kissed.
They almost did the nasty in their office but when she grabbed his third leg (his dicc) she noticed that it's was too big and she stopped because she thought it was going to destroy her if they did it without preparation. Then they were interrupted but they ended in the promise of marriage and live together.

AAAAAAHHHHHHHHHHHH
I saw some spoiler and ASTOR BROWN is actually a WOMAN. She is actually just wearing men's clothes and is wearing her hair short.. at the end of the novel it said that she married an emperor from another place.
OMG I DID NOT EXPECT THAT! BUT I STILL SIMP AAAAAAAAHHH.
Imma add more spoilers later~