The 40-year-old "The Reader" star said her daughter Mia, 15, wants Liam "all to herself," reported ET online.
"She is very disapproving. I'll have to run it by her when I get home. I just think she wants Liam all to herself, quite frankly," Winslet said.
Hemsworth, 26, portrayed Winslet's love interest in the 2015 drama film "The Dressmaker"
She previously joked that Mia struggled to hide her jealousy when she heard her mom shared an intimate moment with Hemsworth.