I totally missed this. The Star newspaper claimed that Kate is seething with jealousy that Meghan no longer has to abide by Royal protocols and can live her life as she wants.
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My personal take is that this is probably over-egged, which trashy tabloids ten to do. But I can imagine her at times feeling a bit jealous of Meghan's freedoms. Surely that would just be natural as she has to follow yet another Royal protocol, and yet sees Meghan doing what she wants to do?