Listen, my man: this weekend is only a test you're making for you to understand how much this woman is into having sex with you. If she wants to have it once or twice in two days and you are OK with 6 or more, it's going to be kind of hard for you to keep on.
Everyone here is telling you to "dial into other things", I would not go that way. If you as a man want to have sex 6 times in two days, you have the right to do that. The feeling of wanting to bang is not wrong. Feelings are, in general, never wrong. Our reasoning over them is. I don't want you to think "Oh, I maybe want to have TOO MUCH sex, so I'll dial it back". No, you won't dial it back. Some men wanna bang once a week, some men wanna bang once a day, some men more, some men less. It's the same sh1t with women, you just gotta find the one that fits you better in this aspect.
Me and my girlfriend have sex one day a week. In about 2-3 hours we have it at least twice and if she stayed a couple of hours more, another two times would make it 3 or 4 times averaging more than you do. I never heard my girlfriend say "You're sexing me too much". I would personally find that weird. Maybe your GFs libido is lower than yours. Who knows. But remember, the weekend thing is not you changing for her, it's you testing and checking out where she stands regarding this.