Nah, Io activelly pursues physical contact with him, she wanted to cuddle and hold hands in the bath scene with Sara and Yuki, but when the touch turns sexual she becomes nauseated, she had to get under a bridge and puke after he touched her in his bed.
I think she was forced to do sexual things with a male by a female, and probably the male was very supportive of her, but had no choice in the matter like her, we know nothing about her family except that she lives with her aunt so I won't speculate too much, but I don't think she would've opened up to Uta considering she thought Uta was a boy if she had androphobia.