I seem to remember that there was an "Emma" sequel as well, and made out that Emma was sexually repressed, remained a virgin and frustrated Knightley until she (Emma) had a lesbian affair that released her.
Was that Emma Tennant, too? If so, I was not impressed with plotting. Jane Austen's novels are all about operating within very narrow parameters (sorry if that sounds too Trekkie), so the "release" and overt lesbianism were outrageous. Apart from the idea that lesbianism is just a sublimation of heterosexual desire.
Pride and Prejudice and Zombies drove me mad, it was so crap. There wasn't even a decent allegory for the plague of zombies - no slavery, no women's subservience, nothing! AAAARGH! Only entertaining thing was when Mr Darcy told Elizabeth his balls were at her disposal. That was the only enteratining thing. Really.
There's a decent sequel called something like Mr Darcy's daughters, in which Elizabeth and Darcy's daughters do a London season and get into scrapes, some of which threaten serious reputational consequences, so working within boundaries, as mentioned above.