A possible concise summary is:
Duny tells her friends the story of how she met Cooper, her ex-fiancé who left her at the altar. She recalls their tumultuous relationship, which involved breaking up and getting back together several times, fighting with his family and friends, and proposing to him in a movie theater. She also reveals that her best friend Cassandra, who paid for the wedding, died of a terminal illness and left her a letter to open in three years. Duny confronts Cooper at his new apartment and tells him that she forgives him and is grateful for the life she has now. She also warns him to stay away from her grandmother Dorinha, who hates him. Meanwhile, Lana Creezo, a mysterious woman who is investigating the boarding house where Duny used to live, finds Marta, the owner of the place, and asks her about Aunt Red.
Here are the key facts extracted from the text:
1. Amina Adab recently moved to a new location as part of an exchange program.
2. Duny's friend was left at the altar by her fiancé, Cooper.
3. Cooper arrived at the boarding house where Duny lives.
4. Duny had previously broken up with Cooper 17 times in 8 months.
5. Duny's friend Cassandra paid for the entire wedding.
6. Cooper's family did not want to be part of the wedding.
7. Cassandra is Duny's mother.
8. Cassandra is rich and had been financing the wedding.
9. Cassandra revealed to Duny that she is sick and had been hiding it.
10. Cassandra told Duny that she is going to Paris and wants Duny to remember her as she is now, not sick or weak.
11. Cassandra left two notes for Duny, one a goodbye letter and the other to be opened in three years.
12. Cooper never actually left Duny at the altar, but rather Cassandra disappeared.
13. Duny forgave Cooper and acknowledged that she is better off without him.
14. Duny is now living with a new group of people and is happy.
15. A woman named Lana Creezo is looking for someone named Ms. Marta, who is possibly connected to Aunt Red.
16. Lana Creezo is investigating something and believes she is getting closer to an answer.