Since grandma brought you up, and you and grandma have deep feelings, grandma must hope you are happy. If she really lives in heaven, she must not want to delay the happiness of her grandchildren because of herself. I think, she should be able to understand the special situation, and she will certainly understand your mind.

If you really feel guilty or afraid of gossip, I think you can discuss it with the wedding. Add a link to the wedding, put some photos of yourself and your grandmother on the big screen with music, recite a poem in memory of your grandmother or say some psychological words, thank your grandmother for her upbringing, and regret that there was no blessing from her at the wedding, so let her come to the wedding scene in the form of a big photo full of smiles and let her witness the happiness of her grandchildren in another way. If you have a good voice, it's not bad to sing "Know You" to grandma.

I think this will make your heart more comfortable, and at the same time make the whole wedding feel good and full of warmth.

I also got married in May this year. I hope the landlord is happy:)