"The one thing I won't tolerate is her being spoiled or bratty or having poor manners. That's one area [in which] I'll be very strict," Trump, who's worth an estimated $150 million, told the magazine. Trump's father, Donald, is worth $3.2 billion.
Trump is expecting her second child in the fall, and wants Arabella to learn to share in the meantime.
"She's really good at telling me I have to share with her. She's less good about actually sharing back," Trump joked.
According to Trump's Twitter feed, little Arabella is already learning to give orders.
"Just arrived in Rome. Arabella overheard someone say "pronto" & has been saying it repeatedly (accompanied by a grand hand gesture) since!" Trump tweeted earlier this month.