I do actually wonder if Hanners is trying to work towards a relationship with Marten specifically, given how it's being hinted towards now by characters that are meeting Marten for the first time (Hannerdad and Lt. Potter).
From a narrative perspective, I'd actually kinda like to see Hanners try it before she's actually ready for everything it entails, and then Marten handling rejecting her (I don't want to see him dating her unless she's completely ready, and given the timescale involved, I doubt that would happen except as possibly the ending of QC), simply to see how that drama works out. Potentially, the fallout from that would also provide character development for Marigold - it'd be an interesting role reversal, as Hanners has been there for every failed relationship attempt on Marigold's part.
As for Lt. Potter... depending on levels of drunkenness, things might still happen, although I'd guess it'd be in a bunk, and not in zero-G. Oh, and why she wouldn't know about Hannelore's insecurities... note that she refers to her as "the doc's kid", not "Hannelore". Even if she should know, she probably doesn't care enough to remember that.