What was he psyching himself up, like even if she is changed he would impregnate in her alien form? It should be pretty doable, even if he really dislikes her appearance that much, as long as they are in the dark, her vagina is vaguely shaped similar to humans, it shouldn't be a problem.
I had to laugh when she called him kind. The only kind thing he did before that moment was offering her some food, the rest of it not so much.
Also, Aliens with super survivance technology and she doesn't know about Japanese mentality?
@HYBRID_BEING She should have come to a different country. It doesn't matter how theoretically virile that person is if the deed is never done.