The Jung sisters again showed their fun and loving relationship.

Jessica recently posted a comparison picture onto Weibo that combined a picture of a monkey and a picture of sister Krystal from drama 'Heirs' striking a similar pose!  Both the monkey and Krystal are covering their mouth with their hands while raising large, adorable eyes.  Jessica also wrote, "I love you.  My love."

SEE ALSO: Krystal confirmed to appear in upcoming film 'Audition 109' alongside actor Jung Woo

She revealed that she received permission from Krystal to post this picture, but wrote, "Still, I feel bad so I will take it off," and deleted the picture five minutes later.

Netizens wrote, "Did Jessica dis her younger sister's looks?" "The sisters are having fun," "I look forward to Krystal's counterattack," "I am sorry, Krystal, but they really do look alike," and more.