Pregnant mum-of-one Ashley Tisdale has admitted she vowed never to have a second baby. The ‘High School Musical’ actress and singer, 38, who has three-year-old daughter Jupiter with her husband Christopher French, announced on Tuesday (26.03.24) they are expecting their second baby, by posting about the news on Instagram alongside a series of images of her showing off her growing baby bump. She has now said in a video posted on her TikTok she was nervous about becoming a mum again, confessing: “After I had Jupiter, I was like, ‘I’m not doing this again.’ “I think it was like, physically really…