Kristin Cavallari's husband is ''weirded out'' by pregnancy sex.

'The Hills' star admits her partner Jay Cutler feels uncomfortable being intimate during pregnancy and doesn't like talking about their future child when they're beneath the sheets.

Kristin - who is expecting her second son in May - explained in the new issue of Fit Pregnancy magazine: ''Sex is funny when you're pregnant. Guys get weird about it. I'm like, 'Oh Jay, the baby's kicking!' And he's like, not wanting to know about it.

''It's important for women to realize - if your guy is a little weirded out but isn't good at expressing that, it can be isolating.''

However, the reality star has come up with a fail-safe plan to restore the romance.

She joked: ''Lingerie always helps too.''

The 27-year-old shoe designer - who tied the knot with Jay in June 2013 - is already a mother to Camden, 19 months, and is glad the couple decided to have children so early on in their marriage.

She said: ''It's cute to see Jay as such a great dad! We're excited to do this while we're young. Then when the kids go to college, we can travel and do whatever we want.''

Fans won't be seeing Kristin and the Chicago Bears quarterback's children on TV screens any time soon since they intend to keep their family life private.

She revealed: ''We get reality show offers all the time and we're like, 'No'. Family is so sacred, why mess with that?''