Photo: Annette Grant/NBAE via Getty

Nia Longis prioritizing her son as she deals with the fallout ofcheating allegationsagainst fiancéIme Udoka.
A source tells PEOPLE that theFatal Affairactress, 51, is focused on keeping 10-year-old son Kez Sunday stable amid the controversy.
“Nia’s main focus right now is her son,” the source says. “Her priority is making sure he’s okay and staying on his normal routine.”
Long and Udoka, 45, have been engaged since 2015. She is also mom to 21-year-old son Massai Dorsey II, from a previous relationship with actor Massai Dorsey.
The actress returned to Instagram on Tuesday — nearly two weeks after Udoka was suspended from his role as head coach of the Boston Celtics last month following an alleged affair with a female staff member.
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Ime Udoka, Kez Udoka, Actress Nia Long and Massai Dorsey.Randy Shropshire/WireImage

“A tip for mental health,” she wrote onInstagram. “Learn to distinguish who deserves an explanation, who deserves one answer, and who deserves absolutely nothing.”
“The outpouring of love and support from family, friends and the community during this difficult time means so much to me,” Long said to PEOPLE. “I ask that my privacy be respected as I process the recent events. Above all, I am a mother and will continue to focus on my children.”
Jon Kopaloff/FilmMagic

Udoka spoke about the situation following the news of his suspension.
“I am sorry for putting the team in this difficult situation, and I accept the team’s decision,” the statement continues. “Out of respect for everyone involved, I will have no further comment.”
source: people.com