Bruce - who had been married to Kris for 24 years before their divorce was finalised in early 2015 - reportedly feels as though Kris is upset she is not "getting her own way" when it comes to the transition.
Another insider added to PEOPLE magazine: "Bruce feels like Kris is used to getting her own way, and going ahead with his transition was not probably part of her plans."
Meanwhile, other sources have revealed the pair are having nothing to do with each other following Bruce's revelation.
An insider said previously: "They don't even talk. She doesn't have anything to do with him, really.
"[She] thinks the transition is Bruce's business to deal with. She doesn't deal with his stuff."
- BANG! Showbiz