Agree with the comment above. I also had a similar thought before but at this point, I think their relationship won't start as an unhealthy one, simply because Doyeon is very respecting and probably can make Jinju understand her worth.
Also, to people think Doyeon would come back to her ex, or that this story needs some straight sex, rest assured it won't happen, at least in a near future. I mean, seriously, this chapter just showed Doyeon doesn't have a desire to do it with men (and personally I also don't think sex is a good way to prove love), just to realize she desires women, so why on earth she would want to find a man if the current thing stopped? Isn't it more logical for her to find someone like her instead? It's still a pure yuri up to now. If anything, I think the drama will mostly come from Doyeon's sister.