As in a relationship? Well, it’s possible, although we are given to understand thar Dylan and Llio used to be an item when they were at university. This relationship apparently ended unhappily. I think it’s possible that it might have been Dylan who ended it. I wonder now if it ended because he discovered his true sexuality while going out with Llio, and that’s why it ended, obviously not a happy ending for Llio.
There is no reason why Matthew would know any of this (and no reason why Llio or Dylan would have told him). Matthew has been suspecting all along that Dylan’s and Llio’s affair was rekindling, and that’s why he was so jealous of Dylan and horrible to him.
But all along, Dylan was (hypothetically at least) Llio’s gay best male friend (every girl has one, according to “Sex and The City”…).
So, yes, why not, and it’s about time Rhys had something to smile about. I just hope John gives Dylan a good deal on the car. At least his, er, servicing should be taken care of. (Sorry, couldn’t resist… )