2. it’s ok to not be ok
3. Unkind Women (the retired teacher who is mother and stepmother of two male characters, and who destroyed the life of a FL when she was a teenager)
4. Ai Long Nai - Ai's mother is a piece of work...
5. Penthouse: War in Life - there are so many wicked mothers in this one lmao
6. To Sir with Love - both of the ML's mom
7. Awaken - put both her kids as guinea pig
8. Military Prosecutor Doberman-
9. Don't Say No
10. the heirs - ml's mum
10 movies/dramas where the lead has step siblings
4. Don't Say No
5. HIStory4: Close to You
6. Ugly Alert
7. I'm Tee, Me Too
8. My girlfriend is an alien
9. The Perfect Match
10. Devil Beside You (going from the description)
10 in which a straight main character pretends to be gay - should be important to the plot. "Main character" as shown in this site's show listing.