Megan Fox feels “happy” that her kids are getting a new sibling. The 35-year-old actress has Noah, nine, Bodhi, eight, and Journey, five, with her ex-husband Brian Austin Green, and she was excited to learn that the actor is now expecting another child with his girlfriend Sharna Burgess. A source told E! News: “She’s happy for her kids that they will be getting a new sibling. And knows they are excited about it. She wishes Brian the best and thinks it’s a great thing.” Brian – who also has Kassius, 19, from a previous relationship – recently took to social media to announce that he’s expecting…