Modified means other than standard pushup.
You can modify a pushup many ways. Your wife can sit on your back while you are in standard position that would be harder to do.
Caution: Make sure anybody sitting on your back while you do your pushups is someone with weight mass 2 or 3 times less than yours to avoid endangering your spinal cord or any part of your body. We all need to celebrate the 100k bitcoin price under a complete wellness condition. I think modified/standard pushups should only be carried out only by those persons that are with the strength to, otherwise the causal pushups are still valid.