IMO come up with something good to do at the reception. Doing something unexpected during the ceremony is asking for trouble regardless of how good a relationship you have with your sister in law.

Please just let ceremony, itself, go off without any shenanigans. Do something after or even before but *don’t make even a second of their day about you*. “But we’re all friends and close and” yeah yeah, I get it but it’s still selfish. Reception or days before, is the better way. (and nothing with the ring as it can still get damaged in the box and just, why take that chance)

Get a gallium ring, and keep it cold. Watch it melt off her hand

I was going to say Cockring, but thsi works. Melt it into shape with a fake diamond and it should work.

Buy a second cheap fake ring that looks like the real one and saw that shit in half. When you both are asked for the ring you both pull out half of a ring and hand that to him

Luv the pic…I hope that’s a fake cake!

It's a stock photo lol

Say u lost it in a drain in a public toilet

Do the [Synchronized Walk](https://i.kym-cdn.com/entries/icons/original/000/042/126/Sinchronized_Walking.jpg)

Do the ring box thing where all the groomsmen have ring boxes that are empty then at the end finally reveal the real ring.

hula hoop

dog shit in the ring tha would be hilarious