It's not a lie if it's hinted at in the description. Read Luis' character profile.
And if there is no planned NTR, why is this author the only one who outright refuses to make a clear statement that there will be none in the future? Being upfront is a major advertising point that will immediately increase your userbase, and they still insist on leaving the possibility hanging there to ward off potential customers? For no reason at all? Get real. You will get NTR'd, and everyone will say "Told you so".