You have shoulder dents because your bra doesn't fit.
The bra should support you, but not by the straps. You're not wearing the correct type of bra and/or the correct size. Even with the straps down, you should be supported by a correctly fitting bra.
The dents will go away in time, as long as you don't have those straps holding you up. I used to have a the same problem.
Check to see if any stores in your area have a bra fitter. If not, have someone measure you for size and go shopping. You can look up how to fit a bra on the internet. Try on as many as available until to find a comfortable bra that lifts and supports even with the straps off of your shoulders.
Congratulations to your daughter on her upcoming wedding.