An overwhelmed Sarah, who is pregnant with twins, said yes to a chorus of claps and cheers.
"Relieved," is how he felt afterwards, he says.
Sam enlisted the help of Toni and Jase and the idea for a fake vow renewal ceremony was hatched.
Toni & Jase give their top tips on how to have a long and happy marriage.
"I don't think things change when you get married, you're already committed. So my advice would be to keep your humour and realise that it is very hard when you have little kids, it can be stressful. But at the end of it you've got each other, and to have someone that always has your back is the most amazing thing in the whole world."
"When we first met, we were our own people already and I'm not going to lie, I'm a better person because of Louise, but I think it's still important to have your moments where you miss each other. And I know it's cheesy, but we are literally best friends. There's no one else I'd rather call when I have good news, or bad.