Well, we think so. Its assumed right now that if the virus is present, you are infectious.
Aj
Is it possible to spread Molluscum if no outbreaks are present (ie, during the time of incubation)?
Molluscum is really contagious, and honestly, I'm surprised your gf hasn't already gotten it.
There aren't any transmission stats that I know of, and I don't know if brief contact like that would transmit it, though obviously the less time of exposure the less likely you are to transmit.
Check the health topics here (click the icon at the top of the page) or go to www.ashastd.org for more info on molluscum.
Aj