Christina Aguilera and Matthew Rutler will have been engaged for two years on Valentine's Day, but don't expect a wedding any time soon.

The 35-year-old singer told Women's Health that despite their long engagement, the couple are still in the beginning stages of talking about their wedding. "We discuss it when we're snuggling in bed," she said. "But it's a casual conversation."

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Obviously, Aguilera is in a good place in her life -- but explains that balancing her needs with being a mother of two can be challenging. "Mothers are constantly expected to be the nurturers, the givers, the providers of a comfortable home," she explained. "We're expected to be pregnant, have the kids, breastfeed once we have the babies. And we're expected to look amazing after baby, right? Keep our husbands and boyfriends interested -- because we're supposed to get back to sexy and keep things exciting in the bedroom. There's such a long list. Having children is the ultimate joy, and I love my kids, but women have to find time to nurture themselves."

The Voice coach also called women out on being too hard on themselves. "If you're not feeling confident on a certain day, you have to let that go, and own, 'Yeah, I'm not feeling confident today' and you move on and try to enjoy the best you can," she said. "I'm not into deprivation; I'm not into suffering into getting a great body or the body that you want. I'm into enjoying life, being conscious and aware, but also breathing into yourself and owning what you got."

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One thing's for sure, Aguilera loves being a mom to son Max and daughter Summer Rain. "Being a mom the second-time around to now a daughter -- I have a 7-year-old son -- is amazing. They both are the joy of my life," she gushed to the magazine. "I swear if I hadn’t called her Summer I would’ve called her Joy because she just lights up a room and she illuminates brightness and happiness."

When ET chatted with the "Beautiful" singer, she also couldn't help but dote on her little one. "She's precious. She's so adorable, she's really, really good and just is bright, big blue, eyes," Aguilera said. "It's like looking into her soul."