
MAJOR SPOILERS ABOUT THE BABY REVEAL!!!
the alpha gain is supposed to marry finds out he's pregnant in chapter 49 i think and goes to his HOUSE to confront him in chapter 50. Then hyoen (or however his name is spelled) comes home to see the papers about his pregnancy on the floor and the other alpha leaves soon after.
Now I can't read Chinese so I don't know exactly what the argument entailed but they do get into an argument, hyoen ends up slapping him because he was so upset gain didn't tell him and runs away crying BUT gain actually goes after him this time to nip this in the bud. So hyoen isn't upset at the fact he's pregnant but the way he found that out

spoiler!!
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the papers were about his pregnancy and pills which he got to abort the baby. he told the alpha that he decided not to abort it. they argued because alpha felt that he should have told him but instead kept it a secret and single handedly decided to abort without even telling him. if i remember correctly, alpha thought omega had already aborted baby but omega says he didnt because he wants to raise a baby that takes after alpha.
please i wanna see hyeono’s reaction when gain tell about baby :’)