Budgies Mating while female is carrying egg

My budgie laid her first egg on 9th and she mated with the male on 11th and again on 12th. I’m worried because she should have laid her 2nd egg by now. She doesn’t show any sign of stress or pain and she looks pretty much fine though. I just have a concern about it if anyone knows let me know. She mated only for about 2 minutes not longer than that and she didn’t show any resistance from the male.