I don't think someone who replies nicely like that is gonna bait and switch NTR into their web comic. Doing that would be mean-spirited to what few followers they have, and that's an understatement. I think we're safe here.
They're gonna get flamed real hard if NTR bait and switch actually happens, and I'm talking about the Japanese followers, they're not gonna be shy about that. CMIIW but apparently the author of "Zutto Otokonoko da to Omotte ita Gakitaishou ga Onnanoko deshita" basically disappeared off Twitter, after their comic started gaining backlash; and that one doesn't even have NTR in it.
That's gonna be real bad for an artist who's new like Ashito-sensei. I'll choose to trust them.