eggs that have never been hatch b4

This is Chirpy(m), my dad actually found it on the streets and brought it home with him. Chirpy is a Peachfaced+fisher Mixed love bird. I do not know the exact specie name. After keeping him for a year, we decided to find him a mate. Being a mixed species, we had problems finding a mate for him. As we wanted a peachfaced lovebird(F) for him. We did not read very much on Chirpy's species and thought it wuld not be a problem during mating, But the birdshop owner assure us that it will not be a problem. We went to various bird shops in Singapore, hunting of a partner for him hehe... After a few mths we gave up and went back to the usual hang out where all bird craze ppl wuld be. & to my suprised, Chirpy finally found a mate which was a fisher. fishers are very aggressive and fierce. I had to think about it before buying it from the owner. But seeing both of them so loving and only a few mins of interaction they clicked, without hesitation we bought the bird. eggs that were lay and never been hatch before total 30++ eggs and we decided to stop. look how amazing and hard working the mother bird is. the beautiful nest made up of just sticks which i threw into the cage. it even built a curtain to cover sunlight from entering the nestbox. I felt sad for the pair cos sometimes i feel they are just arguing and having the female sitting on the eggs for the day etc... we felt that soemthing is not right and it is not possible unless 1 of them has a problem. I went to do detailed research and to my suprise, Chirpy was infertile which means he can not fertilize the eggs. I didnt believe it at first and let them tried laying eggs giving them the best food we can give to norish their body. but the eggs never hatch. But no matter what they are still a pair of loving birds. Both birds were abandon by previous owners. I still remember how the mother bird look like when i first brought her back she look sick and skinny, feathers all dull but right now they are Great!

.They are still a loving pair of lovebirds.