"Transformers" hottie, Megan Fox, admits she is very maternal.

Megan, who features on the cover of the W Magazine's March issue, says that although no one believes her when she says it, "I'm really maternal."

Fox, 23, was spotted Monday shopping with her boyfriend Brian Austin Green and his son Kassius in Los Angelas.

They looked very comfortable together and Megan was having a great time with Kassius.

Megan told W, “No one believes me when I talk about this, but I’m really maternal,”

“I worry that because I’ve always wanted [children] so much, as the world goes sometimes, I won’t be able to have them. Even though I would be able to provide them with such an amazing environment.”