A source tells Radar Online the 51-year-old actress wants to avoid the wedding because she is "still reeling from the divorce." Moore and Kutcher married in 2005, but divorced in 2013 due to irreconcilable differences.
"Demi is tapped into Ashton and Mila's wedding planning," the source says. "She's telling friends that she's going to get out of town during the time frame of when the wedding and pre and post-wedding festivities will go down."
"Demi knows she'll have to endure hearing about the affair," the person continues. "But the wound is still fresh from their divorce and Demi doesn't want anything to trigger a relapse. When she gets word ... about the exact date, she's booking a trip to the yogic spiritual center of India, Rishikesh."
"[Moore] plans a similar, though less intense and far away, retreat to coincide with the birth of [Kutcher and Kunis'] child in October," the source adds.