my kids aunt had a baby 4 months ago she breast feeds I can't when aiden is born due to psyc meds so…

my kids aunt had a baby 4 months ago she breast feeds I can't when aiden is born due to psyc meds so while visiting us from mass she has to pump and her daughter is in mass still so she dosnt wanna waste it she wants to give it to me it's enough for 3 or 4 days will that help even just for that long?