Heh..I'd like to think so...but...I'm sure there's others with more knowledge than me...
However, I will add to Yu's comment:
Dominiques romance path is a T1 romance (I believe on both good/evil paths). You do not have to open the Junko romance in order to aquire it, however it is recommended (assuming you're a good/dom). It's also recommended (imo) to ensure you get the Meet Dominique trigger (do not get 2 meet V points, 2 points activates her instead regardless of how many meet points you have with anyone else btw).
That aside, even if you do have the JunkoRomanceOpen flag set, you can break it in the spa scene with Katsumi, Chanel, Deliliah and Maria. If not broken here, you can break it (if good/JunkoRomanceOpen/DominiqueSponsor) the morning after Dominique ranks you up herself from K6 to K7 (bypassing anyone else as a perk of her sponsership). Junko wakes you up and confesses her feelings to you. You can end the romance there (or keep it open..doesn't matter).
As a small aside: Do not screw Dominique over by not picking to meet Veronica for first corpo training...bad...very bad (do pick dominique to lose sponsorship though if you want her dark path muhha haa haaaa, though you can meet someone else first once arrived at Joy Facility...then when meet the three sisters, pick Dom first for corpo training to get her dark side..just have min 4 evil points to trigger option. Regardless, if you get Jules' or V's sponsorship first, this is the section where you pickup Dom's sponsorship if you did not get it first)
Anyway, carrying on:
On Game Day 07 (Joy Facility Day 5: Program Day 04) Dominique will take you to her house in the mines (this after your first W2 pod training session). She will then come on to you heavily and at this point you have options. Decline (-2 rel points) or accept. If for some reason, you still have the JunkRomanceOpen flag, then the dialogue changes from Dominique and you can cheat on Junko. Matters not to the Dominique romance (yet at least). This is the start of her romance arc and you will get the DominiqueRomanceOpen flag set. For now...this is purely a friends with benefit relationship (at the end of ep7).
After all that, I'm quickly coming to the realisation that I may be a little obsessed with KG lol.