Hi there and welcome to the forum. If your partner had any joint debts with his former wife they would be included in the bankruptcy. Your partner would not be liable for any debts which are in her own name. However, if there was a joint property her creditors would be able to press for payment from her 'estate' (assets available following her death such as her share of any property etc)
Hope this helps
Melanie Nicholas 28 years insolvency experience - 23 of which in the Insolvency Service - Insolvency Manager Jones Giles