my wife left, but still lives with me #2/continued

[tough spot]

I want to talk to my wife about financial and custodial concerns of mine. The kids are the biggest concern for me. Is the 'not bringing a subject up' just for the R? Right now my wife hasn't filed for D yet.....but I am wondering what her plans are when she does.

I am finding myself worrying constantly as to whether i will get 50/50 physical custody. I want the kids physically, half the time, not the 'standard 90 days' that alot of dads wind up with.

I think I need to know so that if she and I aren't on the same page, I can start planning with a lawyer. I really don't want to be caught by suprise or lose any potential positives due to inactivity on my part.

How to bring up and discuss without really bringing up the R? Any ideas/thoughts/input?