Put the male in with her again. She might not lay until after her third shed. That would mean that NOW is when she should be paired up.... but then again, 14 days isn't toooooo long.
I thought my South Florida King and my Honduran had their pre-lay sheds and waited and waited... then after about 19 days I put the males in with them and saw/heard breeding action for the first time with those pairs.
Did your snakes copulate just the one time????
p.s. take all of this advice with a grain of salt... I've never worked with African House Snakes... I'm just assuming they are similar to other colubrids....