If Fujino leaves only the two endings he talked about earlier - tforgetful cuckold and willing cuckold, then this will not allow Suguha to stay by Kirito's side. In the last bathroom scene, Suguha bluntly told Kirito that she wanted reciprocal feelings and an official relationship, but in these endings Kirito stays with Asuna (he knows about the betrayal, or he doesn't know). In order for Suguha to stay with Kirito, we need another, new ending.
There are too few reasons for Suguha to sit on Inoda's cock. Interest is clearly not one of them. If she was interested in big dicks, she would have stayed with Hebeshima. So the reasons could be either to save Kirito or to find a way to free Kirito from Asuna.
Well, or Fujino will just break Suguha for no reason.