Love won the 1000 Guineas in Newmarket in a refined style, while Peaceful let off steam with the Irish equivalent to Curragh.
The two were registered for Epsom, but now it looks like only one will run.
“I was talking to the guys (John Magnier, Derrick Smith and Michael Tabor) this morning and it looks like Love, Passion and Ennistymon will be going to Epsom,” said O’Brien.
“Peaceful could go to Diane. This is what we are thinking right now anyway. La Diane is worth a lot of money.
“I think it’s about separating them – that’s the way the guys are thinking right now and you can’t blame them.
“The two others who go to Epsom with love are very good fillies. One was second and the other third in Ribblesdale, so they are both very good fillies.
“Everything went well with Love. Everyone who drives it has been very happy and the plan has always been to take it to Guinea and then go to the Oaks.
“We always felt that she would be very comfortable going on a trip, so we can’t wait.
“We weren’t sure of a kilometer because she did well at two o’clock, but Ryan (Moore) gave her a nice simple ride for her. She gave him every chance to show all of his best attributes.