Alternatives--IMHO, based on experience with 4 children and 6 grandchildren, all but one of whom were breast fed. The one was born with severe cleft palate so couldn't nurse, and despite his mom's best efforts, pumping worked only for a few days. BTW, at age 20 he's graduating from college this spring, and thanks to multiple surgeries and speech therapy you'd never know he ever had any problems!
(1) Take the baby! Probably the best alternative!
(2) Stay home. I can understand Mom's being stir-crazy (been there, done that!), but this too shall pass! In another 6 months, it won't be a big deal.
(3) Pump and dump (in the meantime, having left enough frozen at home to keep baby going until Mom gets home).
The major problem with the last scenario is that many babies find it easier to nurse from a bottle, and after several days on the bottle they will often refuse the breast (been there, done that!). Is Mom willing to risk that? There is no way she can keep her milk supply up indefinitely by pumping! Once the baby decides that bottle (or cup, in my case) is better, the end of Mom's milk supply is in sight within a few weeks.