Something all the Tony fans do not get. (and probably never will)
Tony is an antagonist on the NTR path.
Players make a choice right at the beginning, at the actual start: NTR-No NTR.
Fine, on the NTR path, you "need" an antagonist, or 2 or 3, or maybe even turn Lara into QOS or turboslut, running through every guy she meets. That can all happen. Its all pure NTR. Maybe she could even drag Angel along with her at some point. Who knows, right?
But, on the No-NTR choice, there are still antagonists looking to hijack MC's girls, and turn him into a cuck somehow, not only Tony, but BBC characters as well.
There is/was a cuckquean, harem? and swinging path in the No-NTR section of this AVN. Anyone looking for "tension" can find it, without loser Tony in the mix, simply by the choices they make around Angel, Erica and Lara's interactions with MC and other NPCs present in their scenarios. Getting Lara to accept Angel and Erica into a harem, with her as cuckquean, would provide plenty of tension, if done right.
There is no valid reason for Tony to be anything but just another shitty boss that Lara never interacts with on any other level than work situations, and even that leaves scope for her to be sexy and/or slutty if the dev chooses, with co-workers/Miranda etc.
The fact that there is so much NTR crossover is just a sign that the NTR-loving patreons (and the dev) wanna be whiny little bitches getting their rocks off by possible humiliation setups for MC, even in that part of the game, where they (and Tony etc) just should not belong.