Same thing was with me last year. started in mid nov pairing and didn't lay eggs till beggining of july. I gave up in june since she shed last in may and thought that waas the 30 day shed.. she was fat and wasn't experinced to know that everything was ok. I kept them paired until end of may.. didn't see much activity for a while though.

and out poped 8 healthy snakes from 8 healthy eggs...