Erotic Sci-fi, 2 part series with light BDSM. Beacons as safe words

[Freya]

The story takes place in a futuristic world where the men are very dominant. The MC is punished with occasional spankings but has a beacon (with colors) that functions as a safe word of sorts. In the second book the MC hides away on a spaceship during an attack. The ship is piloted by a man who ends up being her mate. She is punished with occasional corner times.
Read in roughly 2019.