The latter reads to me like Myeongil is drawing a line in the sand regarding his relationship with Heonjae—like he sees him as another sibling to take care of (familial love) rather than a potential lover (romantic love). He's had so many opportunities to respond to Heonjae's confessions but he kept wavering probably due to how confused he was about his feelings. Now with him being aware of Jingi's potential feelings I feel like he's subconsciously starting to sort out if his feelings for each of the brothers is familial vs romantic.
I buy them from l*zhin, but it's also available here https://boylove.cc/home/book/index/id/22161

Damn i wonder if we'll ever get a jingi/myeongil chapter where they aren't having sex. Chapter's really funny though, meyongil getting mad cause jingi's avoiding him and jingi having hallucinations of heonjae and myeong living together.
On the other hand, it seems Myeongil actually intended for Heonjae to stay at his family house with his siblings, since he says, “There’s another mouth to feed now. I need more money.”