4 girls pregnant in my family

Alondra
The first is due in July- she's having a girl 
The second is due in August- she's having a girl 
I'm the third due in December- still not sure what I'm having 
And the fourth is due a week after me- she's having a girl 
4 girls pregnant and 3 are having girls. 
Can't wait to find out what I'm having