Red Velvet's Joy talked to BTOB Sungjae's mom for the first time on the February 27 installment of 'We Got Married'.

SEE ALSO: [PHOTOS] BTOB express enthusiasm about finally meeting fans through 'Our Dream' fan concert tour

Joy and Sungjae were up to their usual bickering this episode when they decided to eat some steamed crab together. Not knowing what to do, Sungjae called up his mom, who gave them the directions.

Joy commented in her solo interview, "I wanted to talk to her with a pretty voice when I was ready, but he called because of steamed crab. I immediately became a daughter-in-law who doesn't even know how to steam crab."�However, Joy did well, saying, "Is it okay if I call you mother?" Sungjae's mom commented, "Of course you can call me mom. Am I your unni?"

On the same episode, the two idol stars had fun at the spa arcade.�