Cuckold sister couple exchange

Six months after Rika and her younger sister moved into an apartment managed by her uncle, her sister Itsuki and her husband moved in next door as well. She had no complaints about her life with the good friends Itsuki and her husband, but Rika had a certain problem. It is the shadow of the opposite sex that I feel in my husband, the betrayal of my husband that I understand because I have been by his side for so long. However, an intense stimulation awaits Rika that counteracts her growing anxiety... Rika's brother-in-law told her about the relationship between her husband and sister...and then Rika's body was held in her brother-in-law's arms...