Lol yup
So I went through the full romance with Piper with every flirt and the final romance, but I was just now travelling with Curie and got her relationship up to max and only took the romance option (was red but I have Cha 10), and the romance went *ding!*
Went back to sanctuary and slept, got the lover's embrace from Curie, then changed followers to Piper, slept again and got the same from her.