I'm not sure the pictures posted. I try again now, just in case

Here she is. She's around 30 years old and had one lemon about 15 years ago. I wish I knew what my husband did right that year but he passed away and now my priority is just keeping her alive through the winters.

Citrus bloom and fruit on the new growth each spring. When you prune the tree back, you are cutting off the new growth, thus the tree will not, and can not produce any fruit. If you keep pruning the tree back your tree will never fruit. - S-