Rumer Willis commemorated her first Mother's Day on Sunday with a series of intimate portraits from her childbirth journey last month. The images show Willis' mom, Demi Moore, at her side throughout the process. Willis, the eldest daughter of Moore and Bruce Willis, welcomed the family's first grandchild, Louetta Isley Thomas Willis, on April 18. She shares the little bundle of joy with her boyfriend, musician Derek Thomas. Willis posted two separate carousels to Instagram on Sunday in celebration of the new arrival. The first featured a reflection on her experience becoming a mom with her own mother by her side.