Rose Marie "Baby" Bosch Jimenez Arenas (born December 10, 1940) is a Filipino politician and socialite who featured prominently in the political scene of the Philippines in the 1990s.

She was relatively unknown until 1993, when the Philippine Daily Inquirer reported that she had a past intimate relationship with the then-Philippine President Fidel V.

For her part, Ms. Arenas attempted to parlay her unexpected fame into electoral victory, running for the Philippine Senate in 1995 and for the House of Representatives in 1998.

Her parents were Alfredo Jimenez, an accountant at the Bureau of Internal Revenue (BIR) and a member of a modestly rich family from Makati; and Remedios Bosch, an opera singer and a music professor at the University of the East (UE).

As the favorite daughter-in-law of Doña Julieta who inherited much of her own heirloom jewelry, this may explain why Arenas is one of the very few females outside of the tightly knit Lopez clan to own such select Philippine jewel sets.

Although Baby and Ramon had five children (John, Christopher, Ramoncito, Maria Rachel, and Roberto), the two eventually separated and she never married again.

From her husband Ramon she received numerous houses in Forbes Park and Dasmariñas Village in Makati on top of priceless jewelry (Ex.