Maybe she thinks “I’ll change him”, she wouldn’t be the first woman to think it and nor will she be the last, she may also think that as there are plenty out there who are thirsty for footballers then they are just saying that they went with him, you know what they say “the person getting cheated on is always the last to know”, and I think this applies here!
It’s a shame and whilst it’s out of order if she cheated when Rebecca was dying then it’s quite common! Sick and wrong as it is then it happens.