The feud between Taylor Wessing’s French office and Nixon Peabody is getting nastier. As first reported by The Am Law Daily two weeks ago, Taylor Wessing’s 55-lawyer Paris outpost has sued Nixon, claiming the U.S.-based firm violated a 2007 agreement not to recruit Taylor Wessing attorneys if merger talks between the two firms fell apart. Those talks ended in November.

Taylor Wessing’s suit also names former Paris managing partner Arnaud de Senilhes, claiming he breached his fiduciary duty to the firm by “surreptitiously” negotiating with Taylor Wessing partners about a move to Nixon after the merger talks ended.