Weight & Balance Question

I have a question that I know the legal answer for but am looking for some
alternative suggestions.

Tomorrow, I want to take my daughter and son-in-law on a flight in a C172M.
We will be flying to an airport almost 50 NM from our departure point. The
problem is this: with a full fuel load, we will be 89 pounds over the max
(2300 lbs). The CG is no problem. The only issue is the weight. I don't want
to leave one of them behind, and I certainly don't want to leave myself
behind :-))).

I am hoping that the plane wasn't refilled after it's last flight but I
won't know until I go to the airport to get the plane. Should it be full
and I don't have the needed 15 gals of fuel dumped, should I be concerned
about being 90 lbs over?

Please be nice in your answers. I feel like an idiot even asking because I
am concerned and if it wasn't for the fact they are visiting us for
Christmas, I would take one at a time on two separate trips!!! And at the
same time, I'm not in a hurry to get us hurt (or worse) just in the name of
having fun.

Thanks.

Harry