In one of the candid shots, Burke is seen striking a pose in front of a mirror in a pair of zebra-print knickers and a black bra. In another, Samantha lifts her shirt in her bathroom to show off the growing bulge at 19 weeks, reports the Daily Star.
Law and Burke struck up a brief relationship while he was filming Sherlock Holmes in New York last year. Last month, his spokesperson revealed she was expecting his fourth child.
"Jude Law can confirm that, following a relationship last year, he has been advised that he is to be the father of a child due in the fall of this year," the rep said.
"Mr Law is no longer in a relationship with the individual concerned but he intends to be a fully supportive part of the child"s life. This is an entirely private matter and no other statements will be made," the rep added.