Oh Yeon Seo and MBLAQ's Lee Joon invited his mother over to their newlywed home for the first time on MBC's 'We Got Married 4'.

As soon as her "mother-in-law" entered, Oh Yeon Seo immediately greeted her, saying, "Hello, mother." Lee Joon's mother replied sweetly, "Oh my, Haet Nim," calling the actress by her birth name.

However, things tensed up when Oh Yeon Seo noticed the close relationship between Lee Joon and his mom. She revealed during her solo interview, "I'm jealous of my mother-in-law."

Lee Joon's mother then began investigating the refrigerator and kitchen, commenting, "This is not where the eggs go," and "Why is the sink so messy?" Oh Yeon Seo breathed a sigh of relief when her mother-in-law assured her, "It's okay. Just live [roughly],".

Things weren't all bad though. After tasting Lee Joon and Oh Yeon Seo's kimbap dish, his mother stated, "It fits my taste preference perfectly." Though when Oh Yeon Seo offered to prepare rice, Lee Joon's mom bluntly asked, "Do you know how to?"

The couple then learned some basic homemaking tips.