Arnold Dropped $65,000 on Baby Mama's House

5/20/2011 5:00 AM PDT

Arnold Schwarzenegger Dropped $65,000 on Baby Mama Mildred Patricia Baena's House

Arnold Schwarzenegger made a $65,000 down payment on a house for his ex-housekeeper Mildred Patricia Baena -- less than a year before he admitted to fathering her child ... TMZ has learned.

According to loan documents obtained by TMZ, Arnold made the "gift" payments in two installments from his own personal bank account -- one for $5,000 in April 2010 ... and one for $60,000 in May 2010.

According to the docs, the money was used to secure a loan for Patty's house in Bakersfield, CA -- where she currently lives with Arnold's 13-year-old love child.

The purchase price of the house was $268,000 -- so Arnold's down payment covered nearly a quarter of the total cost.

It's unclear if Maria was aware of the transaction at the time.