Paris Hilton is “obsessed” with her son. The 43-year-old star has taken to social media to reveal that her 18-month-old son Phoenix recently spoke his first word, and Paris has admitted that she loves spending time with her baby boy. The reality TV star – who also has an eight-month-old daughter called London with her husband, Carter Reum – wrote on Instagram: “Baby P’s First Word “Sanasa” [star emojis] Iconic [heart and laughter emojis] l am so obsessed and in love with my little angel baby, he’s my best friend [heart and baby emojis] And I’m so excited to give him and his sister London the m…