Heidi Klum opened up about the unexpected secret that keeps her marriage to Tom Kaulitz "spicy" in a candid interview with 'People' published on July 30.

Klum opens about her "super romantic" relationship with the Tokio Hotel founder and guitarist — and how they keep things hot — in PEOPLE's exclusive cover interview

Heidi Klum and Tom Kaulitz have a happy marriage. Klum married her third husband seven years ago, with the pair being vocal and proud about their happy dynamic, which began after meeting at a party in 2018, and getting engaged only months later.