Generally, in Mass Effect, you're limited to monogamous romance. However, Diana Allers seems (from what I've read) to be a little unique.
- The Mass Effect Wiki entry for Diana Allers notes that she does not become a "committed partner".
- The Mass Effect Wiki entry on Romance does not include a "lock in" point for the Diana Allers romance.
As it is now, I've done a bit of mostly harmless flirting with her up to (and including) the second interview - the one where she says she might follow me home like a lost puppy or something. However, my end goal for this particular version of Commander Shepard is to be with Liara.
IMPORTANT NOTE: I'm not seeking to actually romance both characters - i.e.: reach the final love scene or establish a permanent relationship with both. I've just been perhaps a little too friendly with one person than I should have, while I'm intending to pursue another.
Have I gone too far with Diana for me to have a successful romance with Liara, or is there actually no point of no return (besides the final romance scene) with Allers like there is with the others?