I searched transference and scheduling and found this:
Dynamics of Development and the Therapeutic Process

Whether based on research or just facts, my opinion is that sessions should be spaced out. Before your mom's death sessions were spaced out and you did fine. Now you've become dependent on the relationship with it being weekly (and the loss). I won't say it again, but you know my opinion on your transference already.

If you wish to get the transference under control, it's going to be hard no matter what you do. And I think spacing is the best thing in your situation especially given you have a great support network outside of therapy. But that's just my opinion. I would even suggest changing Ts and starting out 2x monthly, but I'm not sure you would be willing to do that.