Egg Sitting query

Hello, a relatively new owner of a lovely Parrotlet called Lola. She recently had a small clutch of eggs that she sat on for around a fortnight then threw out when she was “bored”. She’s now had another clutch of 4 eggs and has been persistently sitting on them for nearly 3 weeks! This seems like an excessive amount of time, should I be worried about this or should I let her take her time and move on from them when she is ready?