If he is so willing to take little blue pills I have one that would be much more appropriate for him:
They might actually keep him in line
I doubt they want anything to do with him directly, but they absolutely keep tabs on him to some degree, likely to see if he does anything overtly stupid that might come back on the rest of the family. After all I doubt they were too impressed with the attention they must have got from lucas talking creepy about his niece, that soliciting kiddie porn from that 17 year old in VA and the starbucks incident. They probably jumped right on the LA stuff cause one of them said 'uhh....guys he just went to LA to meet a woman....this might end up on the news' thinking it was some underage girl he manipulated into a to catch a predator moment, and they jumped on it out of concern for ending up getting all kinds of attention they don't want if he got busted for something, rather than out of concern for lucas. It was pretty much a 'stfu and sit in a hotel room you stupid shit and don't do that again' moment, its the only reason they would have bought him the room
Myrna doesn't give a shit about lucas, except insofar as he might make her, her family (and by extension her directly) look bad. Dumbshit that she is herself, even she knows lucas is infamous enough that if he gets chris hansen'd doing something like the LA trip, somebody in the media is going to snoop around and want to stick a camera in her face to comment about it, and if that journo digs even a little deeper they'll find kf and stuff like the VA teen incident she is screenshotted in trying to deflect on his behalf