ok, I dont want to mislead you, but here is what I think happens.. if i'm wrong someone please correct me!
Ok, water has a PH of 7 and the hair's ph is lower, so water raises the cuticle slighty (but not in a damaging way). the action of raising the cuticle (by washing it) that close to a cuticle blasting (relaxer) process can cause damage. It takes some time for cuticle to lay flat (like 24hours) again, and I think that's why washing to close to a relaxer is not recommmended. I hope tat makes sense to you.
If you absolutely insist, maybe doing a protein treatment, an ACV rinse (to seal cuticles) and the hair sealing routine (the one that the hair lady does) will help, but i still would wait 3 days if possible HTH, if you have any more questions, ask away!!!!