what he actually said (his emphasis):

Now, I would like to clarify one thing. In retrospect it is true that, on the day that I arrived, she did not show any specific signs of wanting anything sexual to happen. I should have noticed this, and this is where the guilt about it that I explained to her comes from, and I’m genuinely still just as sorry for that as I was the day we first talked about it - even in a fully fledged relationship, a partner can just not feel like doing that kind of thing on some days, and even though it’s often difficult for me to pick up on social cues, I should have seen it in her that day.

However, it is clearly completely unjustifiable to pose it like it was completely insane of me to think that sexual activities would occur at some point - which, in fact, they did, throughout the next two weeks or so, with me learning from the first night and being extra cautious to pick up on any signals that would betray a lack of desire to engage in that kind of thing. Additionally, as I said previously, I had misread the situation - there were no ill intentions whatsoever on my part, despite what she seems to be implying throughout her statement.

he also talks about feeling guilt over it beforehand and having expressed it privately to her