We discovered a second triplet paradox of dynamic relativity such as Special Relativity after we discussed a first triplet paradox, which was known and solved as being just double of two twin paradoxes, who both after a relativistically trip will be just equally younger then the earths person. The second paradox is if one asks about the relation between the two antiparallel moved astronauts themselves as they do have even a bigger speed difference and a Lorentz factor between them, but nevertheless having same time dilation in relation to the earth. How to explain that switched of time dilation? What is about the other relativistic attributes length contraction and mass enlargement? And same would be to ask if the moving directions of two astronauts do have any another angle to each other. It was concluded that in SRT and no other known theory no solution is available to this new paradox. All are invited to find a solution and we offer by citation our solution too.