OK! Exclusive: J.Lo & Marc Go Shopping For Baby!

Jennifer Lopez and Marc Anthony still aren’t speaking about

their pregnancy, but their shopping is doing all the talking for them!

The parents-to-be visited Petit Tresor, the baby

boutique to the stars, Wednesday afternoon to iron out nursery design details,

a source tells OK!. And the two spared no expense, dropping more than $50, 000 on supplies!

“Petit Tresor will be designing their baby nursery and the

theme is nursery rhymes,” the source says.

After being ushered into the store, which was closed off to

the public, through a back entrance, Marc and J.Lo spent two hours picking out

the perfect baby necessities and accessories, most of which

will be custom-made, including the cribs, changing tables and armoires. “There

will also be custom-painted murals on the walls,” the source adds.

As OK! earlier this month, the couple is doubling their pleasure with twins. But because they have yet to find out the sexes, “they've chosen

both ‘boy’ and ‘girl’ items, which will be interchangeable and the design for

the nursery will be finalized when they do know the genders of both.”

Also on the registry are strollers, Moses baskets, a

complete layette, blankets and a handful of toys.