As a mother who is separated from her children, Megan Fox feels a void in her heart.

The actress revealed to Glamour U.K. for their April issue that divorce has been difficult on her as a mother because she now only has so much time with her children.

“I travel for long periods of time, and they have to attend school, which is what it is,” she explained. “I wish I could take them out to travel with me, it would make things a lot easier.”

“I cry often, every new moon usually. I get in the bath and cry a lot about it because it is hard and not because of pressures that anybody else or society puts on you, but it is just hard being separated from them in that way,” she added. “They are my DNA.”

“It’s hard to not feel obligated to be with them all the time or to constantly feel like I’m not doing a good enough job,” she said. “But I’m also separated from their father. So, I can only have them half of the time.”

“That just is what it is,” she continued. “And in some ways that allows me to have moments for myself, where I can live my life as me, not just always being someone’s mother and that’s nice, but you always struggle with the guilt, kind of feeling like, ‘I haven’t done enough.’ ”

With her estranged husband Brian Austin Green, she has three children: Journey River, 5, Bodhi Ransom, 8, and Noah Shannon, 9.