Great big hugs, Netix ... as the others have said, this is YOUR decision, based on what is the best for YOUR family.

You are not responsible for managing your mother's feelings and emotions (or reactions...)

You are entitled to finish a conversation if you need to (including if she is being disrespectful, abusive, shouting, manipulative or if it is not going anywhere) and you are entitled to finish a converstaion even if she wants to continue it.

You have made a decision, and she has to respect that even if she does not accept or agree with it.

Good luck, with the conversation.