In addition to idioms beginning with at one's, also see idioms beginning with at someone's.
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Example sentences from the Web for at one's
Ganz: This is where everyone makes their decisions and atones with their fathers.‘Community’: Alison Brie, Yvette Nicole Brown, Gillian Jacobs & Megan Ganz Roundtable|Jace Lacob|February 28, 2012|DAILY BEAST
In beauty and song he fully atones for what we Northerners lose because of the southerly distribution of the Cardinal.Bird Guide: Land Birds East of the Rockies|Chester A. (Chester Albert) Reed
A fellow who blunders and owns up to it, partly atones for his mistake, anyhow, returned Nelson.The New Boys at Oakdale|Morgan Scott
He atones for being occasionally somewhat over-dressed, by being always absolutely over-educated.The Picture of Dorian Gray|Oscar Wilde
Columbus appears as a romantic figure in history, the glory of whose successful discovery atones for his many failings.
His poem Between the Banks, for instance, has a touch of sincerity and fine feeling that almost atones for its over-emphasis.Reviews|Oscar Wilde