If that happened, the appeal, from Landry's standpoint, looks like a Pyrrhic victory. If Landry lost coverage, he did so on the most dangerous claim. Legal malpractices and breaches of fiduciary duty award damages chiefly to make claimants whole. Battery, because it's intentional, supports punitive damages. This sounds risky.
Lawyers can avoid risk in several ways.
They can take vows of chastity, and give up sexual relations entirely. Or contracts of engagement may include language dealing with what happens if the legal relationship turns sexual. Just imagine eight or ten contract pages along these lines. Or lawyers may resolve not to have sexual relations with past, present, and future clients under any circumstances. That probably is the safest course.