As Janet said, she complied with nage because she felt her wrist was in jeopardy of being damanged. Do you think it is really important whether the nikyo was perfect? Nope. Nage has some homework to perform a better nikyo, but the technique was successful.
Well, it was successful in the context of a dojo practice, with a health-conscious attacker who was attacking simply for the purpose of learning something and helping her partner learn something. I.e., she was not willing to risk taking a few weeks off from training or work to heal from an injury, knew there would be no negative consequence to herself if she submitted, and was calm and collected enough to realize all these things. To me those are all important assumptions.