Depends on how the manga-ka wants to portray it, but based on the M/M omegaverse that I've read, the swelling that comes with knotting ensures that none of the alpha's ejaculate comes out and it doesn't just happen until the alpha cums. It's a biological step that happens so that there's a higher chance of conception. To be honest, this is the first time I've come across knotting at all in any BL omegaverse that I've read (IIRC). Most of the time I only read about it in the M/M genre.
well we are all confused too. imo, hyesung can't be pregnant since they just had sex the night before. BUT this is omegaverse, anything is possible lol. Idk tho. what the author cooked up with this misleading scene (the one where hyesung was "about to puke") but if that means he's pregnant, so be it. we'll just have to wait next week (tuesday) for the update
Wait in chapter 19 raw alpha knotted n cant get out from uke ass until he cum? i though he already cum? Plus what the point that he changes the position cos uke still in pain?