The Schindlers encouraged him to date and move on with his life.
If I encourage you to break a contract, any contract, and you break it the fact that I encouraged you to break it has no bearing on the fact that you have liability for breaking a contract.
Do you think that just the marriage contract can be broken with impunity or any ole contract?
Where did they say he should date, and while still having control over her?
I read that all as they wanted him to RELINQUISH his privileges as guardian, THUS enabling him to "move on"!