Not too long ago I saw some rare pictures of her visiting the set and lunching with Nimoy and Shatner (who were in costume) and to me it looked like an enjoyable reunion. The pics hinted that this occurred somewhere midway through S2.
The Paramount Commissary was a place to be seen. By casting people.
If you check out IMDb, Grace was still quite busy in the years immediately after Trek, so being on the Paramount lot would be business as usual.