I believe they kind of did in a round about way. Something gets brought to Maverick and he says "that was over 30 years ago." I suppose you could take that comment and extrapolate it to her. They obviously liked each other. They hooked up, probably a few times, and then she moved to DC to focus on her career and that was that. Their whole relationship likely played out over a few months, and by the time of TGM.....that was over 30 years ago. So no real need to bring it up directly, other than to wink a the audience. We can be left to assume.
Plus, have you seen Kelly McGillis lately.