Well it's funny, PAD wrote her as seemingly having real feelings for Jamie until she found out that it had been a dupe then she got really upset, but after that until his death she didn't seem to care what happened to him so that was a bit odd that she got so upset at his death...before PAD wrote her she really didn't seem to care one way or the other about Jamie either...again a kind of storyline to make Jamie look good by having M and Siryn suddenly fall for him and all...
As for M I just hope that they don't sweep it all under the rug as if it never happened...especially not to then have her lecture another character on things...