Have been away on holiday and don't have time to read the full thread, but DH pointed something out a few weeks ago and I don't know if anyone else picked it up.
When Matt returned Lillian's figurines (china shepherdesses or whatever), when he left he said 'Yeah, see you Lillian.' in a very pointed way. DH is convinced he's put a spy cam in one of the figures so he can watch Lillian and Justin. I wasn't having any of it - seemed too way out, but I did LA, and there is something a bit off with the way Matt says it.
DH will be insufferable if he's right.