Sex Life with a 65 year old [Final] [shinayaka]

After losing her husband in an accident, she currently lives alone with her father-in-law. She is domestic, soft-hearted, and has a hard time saying “no.” Lately, her father-in-law has started calling her “Mommy,” and she is struggling with how to handle his behavior.
Yui’s late husband’s father. He was in the same accident as his son but miraculously survived. However, due to the accident, he lost much of his cognitive and linguistic functions.