That's not really a spoiler lmao :') It's an inference
Thanks, mate. Kinda confused at first (thought the mother of the child at the end somehow found Jen, hence the child pointing out to someone who looked like him) and didn't even noticed the birth marks!
Thank you (=・ω・=) Glad to be of help
i was hella confused thank you for the info
Thank you too :)
Glad this helped
SPOILERS:
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His twin actually died on the explosion incident with their mother.
On the 2nd chapter, you can see a baby with birthmarks shaped like burnt marks.
Like that one reincarnation theory saying that a birthmark is the cause of death of your previous life (example: Getting shot on the forehead will result to a birthmark on the same location as the bullet on your next life)
You can also see that the baby can remember his twin because it's often told that twins have the highest bond. It sometimes says that your soulmate is your twin.