"Why are women so obsessed with telling me I need a ring?" she wrote. "Getting married is the easy part, seeing how you are together AFTER having babies is the hard part."
"We're in 2018. Not the 1950's," she continued. "Women don't NEED to get married before having babies. Y'all need to chill."
Meanwhile, Thicke is overjoyed at the baby news. The "Blurred Lines" singer shared an Instagram post on Tuesday of Geary getting an ultrasound. He's also a dad to his 8-year-old son, Julian, with his ex-wife, Paula Patton.
“'They said we couldn’t make another anthem, so we went and made another anthem!'" he joked. "Thank you April!"