Not only is Arnold Schwarzenegger the baby daddy of his former housekeeper Mildred Baena, but it turns out the former “Governator” was also one hell of a SUGAR DADDY!

According to loan documents obtained by TMZ, Arnold made a $65,000 down payment on a house for his ex-housekeeper Mil … less than a year before he admitted to fathering her child!

Arnold split the payments into two installments from his own personal bank account. One for $5,000 in April 2010 … and another for $60,000 in May 2010.

The docs also reveal that the money was used to secure a loan for Baena’s house in Bakersfield, California, 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.

Ohhh Ahhhhnold.