Just address them as your babies.
Recite the Buddha’s name and the Buddha Speaks of Amitabha Sutra for your babies. It will help them attain liberation. Better yet, you should go to a competent temple to request rebirth plaques for them to aid them because they will greatly appreciate your help.
Each day, recite the (Lotus Sutra’s) Universal Door Chapter to pray for children.
Learn the Buddhist teachings in order to become a better wife. Start with Great Master Xuan Hua’s teachings; you cannot go wrong.