@Sira The author did say that this story is the same universe as Smyrna and Capri and Tei and Shuraka might possibly be Seram's ancestors so you're not far off. Mpreg is indeed possible.
BL Recommendations
Spoiler!
https://docs.google.com/spreadsheets/d/1mZ1odzyGGFo534EQwherPU0qyzEMAo1MPHTL8k4AFew/edit?usp=drivesdk