Silly question: If you pump on one side while nursing on the other, how do you accomplish it? Do you have more than two hands??

I've seen various mentions of people nursing/pumping simultaneously, and I'd like to try it but I just can't fathom the logistics since my hands-free bra would block LO from nursing. LO's ped has him eating over 15oz/day at daycare to try to get him on the weight charts, and I just can't keep up pumping at work only. I'd like to squeeze in more pumps at home too so I can get my supply going again! Any suggestions?