From what I gather, the marriage was over before the twins were born.....I am not sure who was at fault. Colin's infidelity, didn't help.....and, Sheila had no support over her abortions and her miscarriage, from her family or Colin...This to me is where Sheila started with her mental health problems....Although, she had her insecurities, prior to meeting Colin...At the end of the day he let her down badly...He admits this of course...