Not being sincere

Oliver hung back his head the moment Jake repeated his question.

If you find out Liam, your best friend of many years is gay, what would you do about it?

Was Jake being serious right now? Why the hell would he ask him that, and for a frickin second time? Did he have to ask that though?

Oliver fell silent, as he further dived into his musings.

What was the deal in it if Liam Harvey happened to be gay? And why would Jake even ask him that? Oliver had always upheld the belief that Liam's personal life as well as his sexual preferences were all it was; personal in every regard.

What then was Jake insinuating with his talk just now? Did he have proof about Liam being gay and as such wanted Oliver in on the secret? Or he felt Oliver should already know about this and was just asking indirectly to make it look like he didn't find out first before Oliver admitted to it?