This is what you posted: I pointed out that Skye likely was not certain that Ward was Hydra, at least not at the beginning, and thus must have considered the possibility that it could have been May. But I also think you are overestimating her feelings for Ward and animosity toward May. Her animosity toward May only resurfaced when she thought May was betraying Coulson. But nothing indicated that any of that remained once they got to Providence. And so far Ward has been the one primarily making the moves on her. While Skye has seemed somewhat interested, nothing has indicated that she was so blinded by love that all reason would have escaped her. On top of that, she is a genius computer hacker, so she would have a more analytical mind than most. The blood likely triggered Skye's memory of having seen it on Ward just moments ago along with his acting weird about it. That, combined with Ward having been at the Fridge combined with Ward's association with Garrett combined with May having been involved in a confrontation where Garrett was about to kill her all strongly implicated Ward. Her mind most likely automatically connected the dots subconsciously, and it was an instinctive reaction for her to conclude, "Ward". No doubt after that initial gut reaction, she consciously processed all the facts. But at least she had the wherewithal to hide from Ward until she could verify one way or the other.