I agree it's been so abysmal (and repetitive) recently, there's nothing much to joke about any more! This week's Diary was just another tedious cut-and-paste text/email job, but it was actually quite intriguing to see the change in the way Liz has started portraying the relationship. Poor DS seems to have shed his previous persona as dashing romantic hero, and is now cast as a needy, insecure teenager desperately seeking constant reassurance from their first love. (wasn't this how
Liz herself was behaving towards
him until recently, endlessly asking him why he didn't want her 30 years ago, why he wants her now, and whether he will continue to love her? When did the roles switch?)
Meanwhile Liz has taken to casting herself as a chillingly cold-hearted partner relishing having the "upper hand" in the relationship, brusquely dismissing his feelings and concerns, telling him it's not "helpful" for him to voice these complaints, and that "Pulling me up on small things is only going to annoy you and me", which actually sent a bit of a chill through me! It sounded like "Know your place!" Add to this the way she constantly rubbishes his friends and exes, and her endless reminders that he loves her more than he has ever loved anyone, (she might as well write "Have you got that message, exes and family? He loves ME more than YOU!") and it all adds up to quite an unpleasant picture. (A couple of the comments on the DM site have picked up on this interestingly.)
Of course, there's no knowing how accurate an impression of the relationship she is giving her readers--but even if it's all fiction, it's still rather startling that she is happy to portray herself in such an unappealing light!
Even the Diary heading seemed to have a faint tinge of subtle cruelty about it, referring to David having got upset over the things she's written about him. (If he's upset that she's written about him, how upset is he going to be when he reads that she's written about him being upset?)

Ditto the references to things she didn't write about before (but in telling her readers that she didn't write about them before, she neatly manages to write about them now!) We've seen her use this trick so many times before when someone has (perfectly justifiably) complained about something she's written. Her comeback is always the same "I didn't write anything that bad...it's not as if I told my readers about XYZ" (proceeds to go into intrusive detail about XYZ!)
Oh, and on a different note, Liz, grown-up writers do not put "ha ha" in brackets after they've made a weak pun. Most people grow out of that by the time they've left primary school!