Luke Forstmann and Alli Sims, with baby Allegra (inset)
's cousin and former assistant
, Alli Sims, is a new mom.
Sims and her husband, Luke Forstmann, welcomed a baby girl, Allegra Theodora Forstmann, on July 14.
"She is a little love bug," Sims tells PEOPLE. "The love I have for her is such an unexplainable feeling."
The family lives in Spears's native Louisiana, and Sims now has her own company, Alli Sims Events and Designs, which handles interior design and freelance wedding and event planning.
Wonder if nursery design will come next ...
– Jennifer Garcia