Joe Jonas is reportedly “open” to the idea of Stormi Bree meeting his kids. The 34-year-old singer has daughters Willa, three, and 20-month-old Delphine with ex-wife Sophie Turner but is thought to have been dating former beauty pageant winner Stormi, 33, in the months since they announced their split towards the end of last year and now an insider has claimed that things are “going really well” between them and they are getting “more serious” with each other. A source told UsWeekly: “Joe is still dating Stormi and things are going really well. They haven’t used the love word yet, but they’ve …