It is not bad to go to a psychologist and talk about the problem.
Otherwise, you have your parents, but above all they are a man and a woman. Not that I justify infidelity, it's just that there are certainly things in their relationship that you don't know about (for example, misunderstandings, lack of intimacy, lack of attitude in general). And surely your mother suffers a lot from your attitude towards her, you can't punish her indefinitely for her actions. Talk more.
Talk to her - tell the truth. If she is a smart woman, she will know what she has lost and that she will never be the same again. This is, in fact, the punishment for her infidelity and betrayal, for the pain she has caused. Being irresponsible and thinking only of her own pleasure, she deserves to suffer that her child is disgusted with her.
Tell her she's a whore and you're sick of her.
Infidels deserve their stakes!
How how can you advise him to call his mother a whore? Is that what you call yours?
Author, it's not your job to cheat on your mother.
This is the relationship between your parents. Your mother risked her life to give birth to you and then raised you. Be grateful.
What problem do you want to deal with? A general lack of trust in people, or specifically in your mother?
In the general case, it is generally enough to remember that not all people are the same. Also, to judge people as much as possible, without giving full trust and without having any expectations.
As for your mother, you can hardly easily overcome it, mainly because you have a keen sense of honesty and justice. If she has not shown deep and sincere remorse in front of you, your consciousness does not allow you to feel otherwise.
The only way to get over this condition is to forgive her, but this can only happen if the relevant factors are present. For example, to show you that a change has really taken place in it and something like this would not happen again. But probably on a subconscious level you feel how things are, and betrayal is what disgusts you, because it would not cause something like that to someone you love.
1 freyamovess answered