Yes I can fake it. It feels weird to do it without sobbing though; I don't understand how my wife is able to hold the lip curl expression even when crying at a relatively low intensity.
The concept of lip curling has been very helpful in getting my wife to accept and embrace these urges. Whenever someone believes that their own behavior is repulsive or shameful in some way, it helps to show them that others have similar behaviors, and that other people have already thought about this stuff in detail and have categorized things and have tried to understand the behaviors. So yes, she knows that she lip curls, but she doesn't seem attracted to lip curls in others.
I've been trying to figure out what aspects of crying she enjoys in others. From what I've gathered, she likes the sound I make when crying loudly; she's encouraged me to make more noise because my sobbing is generally whispery and hushed. She also likes my breast and belly movements while sobbing. I just bought some liquid eyeliner and because she wants to see me with dark tear trails on my cheeks. So basically she likes all aspects of hard crying except for the lip curl.
What aspects of your wife's crying do you like best, and do they correlate to things you generally like in female crying?
I think I share your wife's attraction to breast and belly movements. Though personally I think clear tears look lovelier than the mascara ones, though even that I generally find beautiful. I prefer less noise, however. The best sob for me is the one that's intense but also whispery or husky. Difficult to find but amazing.