YaoiHands's manga / #A bit confused(1)

I thought the plot was interesting. An omega meets his omega idol and they end up doing the do. But the idol reminds him of his dear high school friend/ alpha love interest, but he had passed away. As the story progresses, it answers in a lot of questions but I am still a bit confused on part of the plot. The omega boy was used as collateral for the loan his parents took out, but I don’t understand the threat that crazy dad made. Also, at the end, since we know the idol is the alpha boy who was pretending to be an omega online, why did he say he was gonna get pregnant? I don’t care that it’s the alpha taking it, I enjoy twists like that, but is it just for the kink of it all or??