Ok I really messed up the quote function; my apologies.
Anyway, I agree with all of this, except none of these guys can end their codependent relationships directly and will instead act like a monster until she does the actual breaking up. We can expect Tom to cheat soon. I do wonder if we will see it on TV--neither of them want Kristen to be right.
The writing is on the wall. Tom wants to have sex with Ariana and she doesn't want to, plus she specifically doesn't want oral performed. Then what does Lala do? Have oral sex with Tom's girlfriend. Tom is pushing 40 and wants to get married. Ariana is hanging on to her youth and at this point doesn't want to get married possibly ever. Tom says kids are a non-negotiable factor, Ariana is phobic of pregnancy and doesn't want kids. Tom is loyal to his friends to a fault, Ariana doesn't really care for them and sees them as a duty for the show. The only major red flag they don't have (that we know) is handling money issues.
I very well may be projecting my own issues, but hear me out. I have never desired kids and will not be disappointed if it never happens for me. But when I was married I was VEHEMENTLY against them. It took until after I was divorced that I realized I wasn't that opposed to kids, I was opposed to kids WITH HIM. Now, I have no drive to try for a baby, but no longer live in fear of being attached to my partner for life by a child. I think that might be going on a bit with Ariana.
This post is way too long, but one last thing: ever notice when Ariana is on the wrong side of Tom over anything it's due to a deeply rooted phobia? Phobic about her vag, phobic about marriage, phobic about pregnancy. I think she's looking for a reason not to have a conversation, too, so she makes it impossible to argue with her without seeming like an asshole for being insensitive to her fears.