Rie

Partly, and it is not a demotion. She has put you somewhere in her world and the spot she chose comes with free head rubs. Some people find that stroking for a long stretch eventually prompts a rabbit to have a go back. No promises, but it is a pleasant way to spend an evening.

Some of them just do not, and the behaviour you described is a bonded rabbit by every other measure. Sitting against you, following you between rooms, accepting forehead strokes indefinitely. That is the relationship.

The thing worth understanding is that grooming between rabbits runs up the social order as much as it signals affection: the lower-ranking one grooms the one it defers to. When you stroke her head you are doing the dominant rabbit's job, and a rabbit who is content with that arrangement has no particular reason to return it.