Don't bother--the entire "romance" involves FemShep aggressively pursuing Vega, even after he very politely tells her "no thank you", and even after he tells her that she's making him uncomfortable with her advances. She finally pulls rank on Vega to get him in bed.
It's really a horrible, horrible, horrible piece of writing. If Vega were female and it were BroShep being super-aggressive in his pursuit, we fans would be rightly screaming bloody murder about it.
So...yeah. I would dearly love a Vegamance--but not the way it was written in the Citadel DLC.