In her December cover story, published Tuesday, the singer said that her husband and Garner “work well together” while raising Violet, 16, Seraphina, 13, and Samuel, 10.
The former couple divorced in 2018, with Lopez, 53, and Affleck, 50, marrying four years later.
The Grammy winner has two children with her ex-husband, twins Emme and Maximilian, both 14 years old.
Lopez went on to say that blending their families since their July wedding “needs to be handled with so much care.”
“They have so many feelings. They’re teens,” the songwriter explained. “But it’s going really well so far.
“What I hope to cultivate with our family is that his kids have a new ally in me and my kids have a new ally in him, someone who really loves and cares about them but can have a different perspective and help me see things that I can’t see with my kids because I’m so emotionally tied up,” she continued.
The couple got engaged for the second time in April, two decades after Affleck proposed.
From 2019 to 2021, the dancer was engaged to Alex Rodriguez. The ex-player is the father of two daughters, Natasha, 17, and Ella, 14, and the couple blended their families before splitting up.
“I was so loving to his kids and he was so loving and accepting of mine, and they embraced each other right away,” Lopez told People in December 2018.
“[It was] ‘I get a new bonus brother and sisters to hang out with all the time and it’s nice,’” she added at the time.
Rodriguez chimed in, “Our kids have become best friends and that keeps us both grounded and appreciative. We couldn’t have asked for anything better than the four of them getting along.”
The retired athlete has since expressed his support for Lopez and Affleck’s marriage, telling Chris Wallace in September that he wishes Lopez all the best.
Garner, for her part, has maintained a united front with Affleck and his partner over the years, including trick-or-treating with the couple in October 2021.
For her part, the “13 Going on 30” star has been dating John Miller on and off since 2018.