It’s the final episode of the first season, so Mercy and Linda are trying to answer as many of your questions as possible. How do you deal with sleepwalking? Maria, who lives in Portugal, wants to know how to stop her middle child from telling lies. And Ralf Henkel, from the University of the Western Cape in South Africa, weighs in on male fertility and how to prepare for conceiving.Please note it is no longer possible to contact this programme by email.