If your gut tells you to do it and you can do it knowing it will not mean anything to your W as it relates to a R with you, and this will not bother you, then go ahead and help out.
IF this will set you back with your feelings and anger then DO NOT help out.
If you feel like she is using you, then don't help out.
I think you should with no strings attached.
Me 43 ring off Oct 2014 (my ring back on Feb 2015) H 51 (ring off 7/2013) M 2007 T 1996 S 14 July 2013- H told me he was unhappy.....said he is staying for Son Feb 18 2014 Found out about OW