No, say you need them back by a specific date, make a point to mention the date a few times in that conversation and followup as it approaches. If she’s still blowing you off, tell her you’re stopping by at ____ time/day. If she says she won’t be home, tell her to put them on the porch/mailbox. You need them back, and you’ve waited long enough. If you feel more comfortable, make up an excuse, sometimes I say I have someone waiting for them, like another friend, teacher, parent whatever. Adds a bit of guilt to the mix. Make her options clear and hard to evade. Never fails. ;)