Prince Michael's great popularity in consequence of his diplomatic successes alarmed the friends of the exiled Karageorgevich dynasty, more especially when rumours began to circulate that the prince contemplated divorcing his childless wife Julia and remarrying.
Allowing the queen of Navarre to shut herself up in La Rochelle, the citadel of the reformers, and the king to loiter over the siege of Saint Jean dAngly, Coligny pushed boldly forward towards Paris and, having reached Burgundy, defeated the royal army at Arnay-le-duc. Catherine had exhausted all her resources; and having failed in her project of remarrying Philip II.
In the second instance, you might be remarrying after a divorce or spouse's death.
These may be siblings of the couple, or in some cases, a widowed parent who is remarrying.
Likewise, I can appreciate you wanting to do the right thing for everyone involved as well as your desire to minimize the impact of remarrying on others.
