There is a million dominican looking for that job. Dominican families that can hire a babysitter (middle up and upper class), they wont do it for 3 months. they wont hire a tourist for such kind of work that involve their childrens (you need lot of references). and they dont listen bachata at home. I recommend you to work some extra hours in your country, and come to enjoy Dominican Republic. or look for a job in an area related to tourists. You can stay 3 months here for cheap. if you are among Dominicans, but getting a job only for that period of time and without speaking spanish, will be very difficult. Good luck