Responses
Its going to happen and soon, since in Kiss Me Liar they have 2 boys about 3 years apart. Second is of an age with Keith and Yeonwoo's son and so considering that relationship is already happening in the background and He on woo pretty much gets pregnant right away, it shouldn't be long for Joshua. Likely during Chase's next heat.

I hope Joshua gets pregnant again. When are they gonna address that Chase is literally a father?? He still doesn’t know!