Paris Hilton has put her plans for motherhood on the fast track after spending time as “auntie” to pal Britney Spears’ kids. The socialite-turned-pop star has stated she’ll give up her partying ways and be married with children within three years, and hanging out with Spears has made her even more determined to become a parent. A source tells American publication In Touch, “She loves playing with (Spears’ son) Sean and rocking (baby) Jayden to sleep,” and she reportedly told a friend, “I can’t wait to be a mom, too. It’s been my dream to have four babies by 30.” And it appears the 25-year-old hotel heiress is planning to settle down with her ex, Stavros Niarchos - she has been spotted at parties with the Greek hunk and the couple were seen dining alone at romantic Los Angeles hotspot The Little Door at the weekend. Friends also claim Hilton has started wearing a locket containing photos of her 21-year-old beau.