Saints interviewed Eagles OC Kellen Moore [ 2nd interview completed on Jan 27 in Philly]

She sat in on a meeting with Desean Watson and flew to meet him. Maybe she isn't sitting through the entire meeting, but she could have gone to meet him and talk for a bit.

You could be right, but I find it odd that if it was MM's job they wouldn't be waiting until the end of the week to talk to him and they wouldn't have flown to Philly this quickly right after the NFL Championship Game.

If MM was the choice and they were just doing due diligence it seems like they would have already talked to MM or would meet with him before the end of the week.
It's possible that the Saints and MM's team have been talking.

If MM is their first choice, I can see reasons why they schedule him last. If MM isn't their first choice, I can see reasons why they schedule him last. My point, I don't think MM being scheduled last really gives us any insight into what they think of him.