Yes, DM trusts Kaddu a lot!
This Kaddu track can go two ways and I am unable to guess which way, now...
Either DM understands that Santo was trying to warn him, and did try to prevent Kaddu from doing anything embarrasing, and it helps him in improving relations with Santo.
Or he gets angry with Santo for not telling him sooner, and letting a farcical engagement take place, making a fool of himself and Meghna! In which case, banta banta his relationship with Santo will go worse, before it gets better!