Return or My WW - Staying Stong!

[Strngr!]

So i got into it with my wife a tiny bit over text message because i asked what time she thought i should pick S1 up tomorow. I told her i made spreadsheet with a schedule for every other week that i should was a fair 50/50 split of s1 time. She started going off about how she thought it was overkill. I told her i wanted yo have even awake hours with him even meal times even bed times etc she stared saying its not fair she get screwed out of time with him cause i work more hours im think well if thats the case its not fair i get screwed and have to pay a larger portion of his bills because i work more hours STFU though. When we decided what time id pick him up she complained about only getting to put him to bed 3 time this week. I was like yah so next week youll get to do it 4 times. If you look at it in 2 week periods thats fair. She also went on to say well if thats the way were gona so it then i should get some extra time because of all the time you spent with him over the holiday and im thinking half the time it was her dumping him off on me so she could go out do her own thing i was glad to take him but again stfu. I just told her i thought it was something we should talk about in person and that im trying to be nice about it and my end goal is 50/50 split or as close to as possible. I also said she doesnt have to look at my spread sheet but i told her it will be what i use to concider how fair the schedule we develop is. Anyone have any advice as to how to determin what is or is not fair? My w seems to have a messed up way of thinking about fairness. She thinks im trying to screw her all the time. That is definitly not what im out to do my goal is whats fair but i suppose what is fair depends on your prespective.