My Big Fat Sober Wedding

S2 E20: At the wedding of her ex-boyfriend, Christine agrees to be the designated driver for Richard, New Christine and Barb. But she wishes she could drink when the groom gives a loving toast to his new bride--and accidentally says Christine's name instead. Meanwhile, Richard gets into trouble with New Christine by professing his distaste for marriage. And Matthew and Ritchie mistakenly think that the wedding gift Christine bought is intended for them.