I'm not 100%, but may have found a way to link MiCrew all the way to a Google calendar via apple ICal.......

A tech buddy had me log into Icloud.com. After logging in, click on Calendar. Then on the left side bar, I saw where MiCrew is listed. Theres a little Wifi-symbol looking icon next to MiCrew. Clicked on that symbol, it then has a pop-up indicating if I want to make MiCrew public or private for viewing. I put wifes email in the private section and fired her off a link to essentially join my MiCrew. (All this I am doing from my desktop IMac if that matters)

Again not 100% if this works, she's still at work as of me typing this. Fingers crossed that was the missing link to make it all sync up and be viewed by both parties.