Still seems like a rather extreme fetish to randomly include.
On the contrary, I'd really like to see something like that included for the daughter.
In my opinion, the relationship with the daughter is waaay too linear until now. Romance is good, but I think it would be better to let the player choose how he would like to make this relationship evolve. After all, this is a "game" and not a movie.
Many people here love "Dating my daughter" because of the romantical relationship between the father and the daughter, but too much romance can be a turnoff too for many other players. For example, the game was heavily criticized for his slow pacing : people were awaiting to see the daughter acting a bit more sexually and pushing the relationship forward.
Now that father and daughter have finally done their first sexual intercourse, I hope to see this relationship evolving into the extremes... or not ! Once again : let the players decide.
I think that making the daughter slowly corrupted by extreme fetishes is heavily believable, as she is so eager to please her father that she will be willing to try anything in the end. Plus, she has already shown some signs of corruption with Elena under the shower when she was asking to be fingered. She also seems to become more and more interested in porn movies, and dirty talk. So, why can't we imagine that she will want to go further and further ?
For the moment, the father doubts about this relationship with her daughter... but he has fucked her anyway, made her swallowing his sperm, and starts to stimulate her ass for anal penetration ! And, if the player did the appropriate choices, he is also fucking her daughter's friends, asked Elena to "stimulate" a bit more the daughter into acting like a slut, and is working his way to mold her daughter into having some exhibitionist fetishes ! So, is it really impossible to imagine that he would like to go all the way and transform her daughter into a nasty slut able to have sex with dogs (or horses ?) if it pleases not only himself, but his daughter too ?
Once again, if two storylines can cohabitate, one with a romantic approach and another one where extreme fetishes are slowly transforming the daughter into a depraved sex addict... then, why not ??? Oh, and of course Elena could be a good choice to include bestiality, too. But the real interest in the game is, and I think we all share the same opinion, to see how the daughter is becoming.
I don't know if the authors are coming on this thread, but I'd really like to know if this bestyiality thing is still forecasted and what they are planning to do with it.
Plus, I think that it would be extremely disappointing if the father-daughter relationship stopped where all these relationships stop in 99% of the adult games : a little anal, some threesome with a female friend, maybe some pregnancy... and that's all. For once, I'd like to see a game who has guts and who goes all the way with extreme possibilities !
PS : I might add that since the game's updates are now rarer and rarer, I will not be able to endure a pacing as slow as it was previously. Now is the time, for the creators, to work a bit on new fetishes into the stories instead of pursuing this "I want to please my father but I'm so shy and innocent that I don't know if I must do that..." process that has lingered for too long !