If you want simple language, say “she made amends”.
Cambridge English Dictionary:
to do something good to show that you are sorry
about something you have done:
She tried to make amends by inviting him out to dinner.
I wanted to make amends for the worry I've caused you.
Idioms by The Free Dictionary:
To provide restitution or attempt to reconcile or resolve the situation
after a wrong one has done.
I'm not sure I can make amends for all the times I've let you down,
but I want to try to be better for you.
Sometimes the best way to make amends is just to listen
to the other person, without trying to defend yourself.
to make up to someone for something that someone or something did.
Don't worry. I will make amends to her for my sister,
who behaved so badly.
I will try to make amends for the accident.
Notice the phrases “provide restitution”, “reconcile”
and “resolve the situation”, which appear in the above definition;
they can also be used.
If you want something more idiomatic / colloquial,
consider “she mended fences with me.”
or “she mended her fences with me.”
My gut tells me that the first form is more natural,
and Google Ngrams agrees that it is more common:
but the dictionaries suggest the second form.
Dictionary.com:
mend one's fences
to strengthen or reestablish one's position by conciliation or negotiation:
One could tell by his superficially deferential manner
that he was trying to mend his fences.
The Free Dictionary:
mend fences
To improve poor relations, especially in politics:
"Whatever thoughts he may have entertained about mending some fences
with [them] were banished" (Conor Cruise O'Brien).
Idioms by The Free Dictionary:
mend fences,
mend (one's) fences
To rectify a damaged relationship.
After Jill heard that her father had become ill,
she decided it was time for them
to mend their fences before it was too late.
The politician tried to mend his fences with his constituents
after the scandal, but was not able to regain their trust
before the next election.
