Your friend needs to WAKE THE F*CK UP!!!This man could bring home a FATAL disease that could cost her her health and her life!!!!!
It's not a matter of abuse, neglect, understanding, love, forgiveness... BULLSH!T!!!
He might use condoms some or most of the time, but who's to say he'll do it all the time?!?!? And they're not 100% either!!!
I can understand and feel her love for her husband and her kindness in tolerating this behaviour, but he's a selfish prick for cheating on her like this and risking harming his loving spouse to his reckless behaviour! And she isn't the brightest bulb in the box for allowing it either! I don't want to get into insults, but she really needs some backbone! Even if she's "ok" with her husband cheating on her every chance he gets, is she "ok" with him possibly giving her a permanent STD(herpes) or a FATAL ONE(AIDS)?!?!
In this day and age, cheating doesn't just have emotional or social repurcussions, it could be FATAL!
I would point this out to my friend.
I would hope that this is all the prompting she needs to protect herself. A wake up call in the form of a positive blood test is not something I would want for my friend.
Edited to add: Sorry for being so harsh, but this is the REAL WORLD!! Not some fantasy romance novel where her kind, tolerant love will set them both free. Her kind, tolerant love could just end up giving her festering sores on her privates for the rest of her life(at best) or kill her!