Ryan - the guy Sionainn has married - (with the electric blue eyes, who had bladder cancer) - I noticed also had no parents at the wedding. (Same as Hannah the day before.) I wonder if they've passed away, or if they want nothing to do with their adult child marrying a stranger. I don't think either one mentioned their parents.
I googled 'Shannon's' proper spelling of her name! I'm not that clever! 