Nashlash..
The place I recommended is fully booked till November and the rent is as low as 333 per day for a fully furnished one bed unit depending on length of stay etc. more pics here
http://www.stanleyhouse.co.nr/
You need to be a bit careful of what area you choose to stay in if you have a child with you given the fact you and your girl have never actually been to Manila or surrounding areas before..
Its hard for us to give any other suggestions without you telling us your purpose for staying and places that you need to be close to etc etc..Be wary of taxi drivers and make sure they turn on meter before the car moves. Be careful of anyone that seems over helpful and smiles to much..It usually means they want to overcharge you for something.
Take care there ya hear!!
Cheers,
Fred.