Mariah, 45, is reportedly desperate to have another baby – and wants to start a family with Australian billionaire James.
The superstar already has four-year-old twins Moroccan and Monroe, from her marriage to Nick Cannon, but could they soon be getting a brother or sister?
A source told Life & Style magazine: "She wants another child and is telling friends she's not too old.
"James is promising to spoil her throughout her pregnancy. He's convinced her he would not only be by her side 24/7, but he would hire round-the-clock care and the best doctors money can buy."
Children may seem like a big step for the new couple, but the reports come after it was alleged they were already planning to tie the knot.
Last month an insider told TMZ: "James already told her he wants to marry her, sooner rather than later."
James, who has three children from his marriage to Erica Baxter, is said to have pursued Mariah after watching her perform during her Las Vegas residency, and is a huge fan of the diva.
According to the insider, Mariah is 'more than open' to the idea of marrying her new man.