I allow my Ts to truck their sack around until they hatch. Most people pull the sack after awhile. I just figure momma knows best when it comes to her babies! Plus I LOVE watching some of the species make a maternity web so the slings can run around it like a highway system!
Spiderlings hatch out.Honestly I don't know if she mated or not i just got her not even a month ago. but that leads to my next question, how can you tell if a sac is fertile?