Rip Clamps During Missionary

Full impact and there is nothing you can do about it.

You have her where you want her. On her back, blindfolded, unsure what is happening next. She moans when you fuck her missionary and lightly pull on the chains to her nipple clamps. When her moaning gets loudest, you rip them off, adding intense pain to her pleasure, calculating that this will force her to the edge and make her ready for cumming.