Christine Quinn's estranged husband, Christian Dumontet, revealed he quietly expanded his family with his new girlfriend amid his divorce from the Selling Sunset star. Dumontet, 47, took to social media on Thursday, April 2, to share photos from his recent travels. His girlfriend, whom he has not publicly named, appeared in the new posts alongside their now-1-year-old son. According to past social media activity, Dumontet's baby was born in March 2025. Dumontet also shares 4-year-old son Christian with Quinn, 37.