I have check out the clip again, the issue is

knows

is doing work with Bex,

knows

doesn't really like it from his body language. I think from

perspective he doesn't want

to know he was there just to save some hassle and it wasn't anything untoward anyway so harmless. The positive from that scene was

absolutely doesn't see Bex as a love interest that was totally just matey banter.
We know this is going to get angsty for dramatic purposes, to give

reason to lash out, for Robron to have a discussion, for a police involvement story and to jeopardise the wedding of the year ..... PLOT PLOT PLOT - Its A Soap - Keep The Faith.