Why Reach behind Woman and Put Hand Behind RT's Neck?
"... even when a little distance between them she still wants to have her arm around him..."
^ meaning what? Maybe ...
- RT was goofing around, making faces w others - in the group or off camera - to prompt him to stand up straighten, compose expression, turn to camera for pic?
- to display affection re RT, for his sake only?
- to display affection re RT, for the camera & ppl seeing pic in future?
- jealousy/territorial marking, to remind the woman between them that RT 'belongs' to BT, not other woman. Purely speculation, no basis: IDK who she is.
- to straighten up his collar which had been cattywampus a second before?
- none of the above?
I'm drawing no conclusions about their relationship on basis of this pic or the few other clues we/I have ATM. JMO.