After she(subject) had divorced with her husband, susan decided to... It sounds much better and it is also gramatically correct because of the use in Past Perfect. Anyway it's only my opinion and I am not an expert. Ask your teacher, it should be correct. Good Luck with studies!
And I almost forgot, divorce also functions as a noun. Another way to write your sentence is: After the divorce with her husband, Susan decided to... Consider this option.