Riverbed asymmetrical routing question.

I have a question about how Riverbed handles asymmetrical routing but all the documentation I can find only considers routing asymmetrical if there is a Riverbed on one side of the connection and not the other. I have a design that requires 2 MPLS circuits from ISP managed routers to terminate on a single Riverbed on both sides of the connection. I want to do equal cost load balancing and utilize both circuits but I'm not sure how the Riverbed will react if traffic passes destined for circuit A but the return traffic from the remote site takes circuit B back. Again, both circuits will pass through the Riverbeds on both ends. Does anyone have any experience with this? Thanks.