AceShowbiz -

While things are seemingly heating up between Robin Thicke and his new girlfriend April Love Geary, his ex-wife Paula Patton reportedly didn't like the model. A source tells OK! Magazine that Paula "thinks he's lost his mind" when dating a much younger woman.

Robin and April recently brought his 5-year-old son Julian for a vacation in St. Barts. According to the magazine, the couple annoyed onlookers with public make-out session at Los Angeles International Airport. An insider tells the magazine that the 20-year-old model "enjoyed the company" of Robin as they "blocked the aisle to smooch" and "delayed the boarding process."

Robin and Paula were officially granted divorce back in March after they reached agreement regarding property and custody arrangement. She previously filed for divorce from him, seeking joint legal and physical custody of their son.

After separating in February 2014, Robin made some efforts to win Paula back, including making an apology to her onstage at BET Awards "I'd like to dedicate this song to my wife, and say, 'I miss you, and I'm sorry.' This is called 'Forever Love'," he said before performing "Forever Love", a song from his "Paula" album.