Affair discovered 3

[STH17]

Sent an email to W asking what she was thinking about the schedule, and I said I love our son and having him on Friday nights is important to me. She replied a few hours later. She says son seems exhausted by the long trade offs (I guess she means the travel time). An ideal arrangement according to her would be to trade every other week. I don't know what that means exactly, and doesn't answer anything for the present reality. I think she means we would each take care of son for a full week at a time. That's not an option while we're living so far apart and son is enrolled in the school she chose. W wants to keep son over weekend every 4th week. I don't like that idea and don't see any reason to agree to that. Maybe I could agree to every 6th or 8th weekend. W says she's unable to drive as far anymore (but my mom and I have no problem picking up all the driving?). She closed by agreeing with my proposal of me picking up son tomorrow at 6, but didn't say where he would be... ugh.

I guess my response should only be to request clarification first to make sure we understand each other, since it is easy for me to react with judgments at what I see as W's selfish reasoning.