Umm. my ex I managed 7 while fingering her, was really easy though with her.. I think it was only limited by her moving onto other things with me. That was in about 20mins.. absolutely ridiculous and I'm incredibly jealous of it, particularly being male :P
My current girlfriend the max is 2 but it's only happened once. They seem better though because I need to know what works for her; it's taken a while but I can kind of read her and nearly always get her to climax now (exceptions are the occasional time when we've had a LOT of sex, and it's kinda run out for her
)