One of my parents is ill and may pass away at the time of the wedding, will we be covered if we buy wedding insurance now in case this happens?

One of my parents is ill and may pass away at the time of the wedding, will we be covered if we buy wedding insurance now in case this happens?
Dream Wedding Insurance

Pre-existing medical conditions are excluded and you will not be able to make a claim under the policy. Please refer to the Pre-Existing Medical conditions definition in the Policy Wording.