That is the hardest question I've had all day but to be honest with you it all depends on how I feel. But if I had to pick two it would be Jada Fire and Havana Ginger. I like this thread my answer might change in an hour
I would have to go with Aletta Ocean and Phoenix Marie, for being my two favorite stars in the business. I didn't really get into boy-girl porn until 2009, shortly before I discovered Freeones, and Phoenix Marie was one of the main reasons for that. For a long time, she was my favorite porn star until she was surpassed by Aletta. This would be a dream threesome, both girls are very adventurous and have amazing scenes.