The Sexy Grandmother(1982)

Tip’s father has a mental problem, but he has been cured by Dr.Chow. Eak is married to Tip, but he still flirts around, so Tip becomes jealous and beats him unconscious. Eak has a strange feeling when he wakes up. Dr.Chow comes to check him out and they set up a plan to fool Tip. Eak still goes out and flirts even more than before. Tip has an idea to get him back by dressing up very sexy on her birthday to surprise everyone and gets Eak’s attraction.