Reasons for the ex-wife to restrict the new girlfriend on social media?

-For context the ex-wife was the one who cheated him with a past high school boyfriend and asked for a divorce. She’s also still in a relationship with the person she cheated with.

-The new girlfriend has little to no interaction with ex-wife. And has only be polite to the ex-wife.

Reasons for the ex-wife to restrict the new girlfriend on social media?
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