Im against cheating and thats what shes doing. I can pretty much guarantee you her husband has no idea whats going on. here are my points
A) if hes abusive, she shouldn't be with him anyways....but how do you know he's abusive...if shes just looking to get "some" maybe shes trying to make you feel bad for her? maybe not but its an option
B) How do you know if you date her shes not just going to do the same thing to you later down the line when she gets sick of you?! i mean shes doing it now what's to stop her later on?
and C) What if theirs kids involved?
Anyways just my $0.02