The Historical Reliability of the New Testament

[Angrboda]

Who was with Jesus and Satan when they were in the wilderness?  

Did anyone see Jesus pray in Gethsemane (Matthew 26:36)?

And how could anyone but Mary possibly have known she was a virgin?

How difficult would it have been for Jesus to have told the disciples about his experience in the desert?

And the disciples were with Jesus in the Garden of Gethsemane, so they knew he was in prayer. I would agree that there was no time for discussion after his arrest, but after his resurrection, Jesus was with the disciples for 40 days, and THE BIBLE SAYS:

3 After his suffering, he presented himself to them and gave many convincing proofs that he was alive. He appeared to them over a period of forty days and spoke about the kingdom of God. 

I think it's pretty reasonable that they might ask, "Dude, what were praying about in the Garden? You were sweating blood!"

Ye olde "it could have been like this" apologetics.  Do you realize how unpersuasive such speculations are?