Serana put her back against my characters body and tilted her head to look back into his eyes..........I guess she wanted some "companionship".
Actualy I have had her do - what I presume was the same action. As I was in first person, I couldn't tell if she leaned against me or just bumped me, but she was right up against me and did look over at me. Now.... if she did that and said something like "you know, I'm feeling a title lonely" -
then I would curse Bethesda.... But anyway, I do think she does that kind of movement, ore something similar.