Yes correct, this woild be the only possible way and even then theres no gurantee hoping things dont wotk out.
However, one other solution to this would b that the new husband passes away i.e. It does not mean that u murder him, then mayb u can get back to firs husband wether they slept or no wont matter cos they were married afterall jus that the guy died. i will hav to clarify this further, will clarify tomorrw