This actually happened right?
Yes. And Shinbo jerking off quietly in the background.
What's the context of that image, OP?
>Ikuhara has a kind of interview in the book on Kaworu that was published a few years ago. The reason is that Ikuhara is universally believed by Japanese fans to have been an inspiration for Kaworu (it's stated, for example, on both Kaworu's and Ikuhara's wikipedia pages), and the bath scene between Shinji and Kaworu is thought to have been based on a conversation Anno and Ikuhara had at a hot spring.
Will Anno one day be forced to kill Ikuhara?
Probably, when Anno get tired of waiting Ikuhara for making an anime together