English native speaker to talk&play with our twin baby boys

I am looking for an English native speaker or at least fully bilingual in English to play with, sing and talk as much as possible to our 14 months twin baby boys. Ideally we are looking for 1h 15min per day Monday to Friday and we pay 10€ for that 1h15min per day to make 50€ per week. The in-house nanny will be home as well, cleaning while the babies are with you.  The 1h 15 min could be for instance: 9am to 10.15 or 9.30 to 10.45 or 1pm to 2.15pm or 1.30pm to 2.45pm.
Main tasks for you are: to take care of them while playing with them and speaking and/or singing to them as much as possible and always in English.
We live close to Plaza de Castilla, Cuzco and Duque de Pastrana tube stations. Our twins are well behaved, easy, fun and grateful babies; we believe you will love and enjoy spending time with them. Ideally we would like someone that can commit long term or at least few months. Thank you!