Yes, I agree. A "normal" affair.
From what I've read, the affair between Petraeus and Broadwell ended some four months ago. Petraeus never left his wife to be with Broadwell and he certainly is putting forth conciliatory sounding language in his resignation statement.
The politician who was a true MLCer in recent years was Mark Sanford, former governor of South Carolina who ran off, literally, to be with his Brazilian OW. In June, 2009 he was missing for 6 days(!) and his wife claimed not to know where he was. When he resurfaced it seems he'd been spending the time with his OW in Brazil and he made a public statement about it talking about how "in love" he was with OW. Definitely MLC script!
Sanford's wife was no stander, although she did say publically she thought her H was having a MLC. She filed six months after Sanford's announcement about the OW. Sanford and his wife had four young boys and had been married for some time.
Sanford's wife wrote a book about the experience. In August, 2012, Sanford announced his engagement to the OW.
Couldn't be more classic. Petraeus' affair sounds nothing like this.
But hey, is there something about physicians' spouses? My H's OW was the wife of a doctor when she met my H. She left her husband, eventually divorcing him, six months after meeting my H and, of course, they're still together.
Petraeus' lover, Paula Broadwell, H is also a physician and this new woman who's been identified, Jill Kelley, the woman who Broadwell sent the jealous "threatening emails" to, which started the whole FBI investigation, is also the wife of a doctor!
TMHP
M 40 yrs.
BD 1/11
Began living with OW 1/11
Divorce final 8/13
Ex married OW 6/15
God, grant me the serenity to accept the people I cannot change; the courage to change the one I can; and the wisdom to know it's me.