It probably was bonding. Makes the most sense. Andor...

Mat blinks and rubs the back of his head. This really really doesn't sound like Rand's completely sane.

Was he talking about Elayne? She was pregnant - did Rand even know about that? Mat knows Rand's the father, even though Elayne never declared it. He said 'them' though... Yeah, waiting for an answer to Perrin's question instead of just repeating it.