My Hero Academia - Cream and Scream

This is not accurate.
Ochako would never support her Deku being kissed by another.

Ochako supports Deku in everything that she thinks is good for him. If getting a girlfriend is going to make him happy, then she would willingly cuck herself for Deku. Case and point, the time she met Mei Hatsume and she was feeling up Deku, and then Ochako saw how big her tits were and all she did was give Deku two thumbs up.