United Kingdom, June 6 -- Nicky Hilton had a "painful" experience with breastfeeding.

The 41-year-old socialite has Lily-Grace, eight, Teddy, seven, as well as three-year-old Chasen with her husband James Rothschild and while she opted to feed them all naturally when they were first born, she admitted that it was all something of a "challenge" to her.

As part of her campaign with The 2AM Club: Feeding Unfiltered, she wrote on Instagram alongside a throwback of herself breastfeeding one of her children: "I breastfed all three of my children, but it wasn't without its challenges. While I enjoyed the moments of bonding, the latching was often painful. I didn't find breastfeeding as effortless as I'd hoped. "

Nicky also explained that she ...