Disguise

Disguise – one of the protagonists assumes a false identity for what seems like a good reason at the time. The other falls in love with the fiction and the first continues the ruse to maintain the developing relationship. I see Mistaken Identity as a variation on this – instead of a deliberate disguise, the second identity is the result of a misunderstanding, but is perpetuated in the same way as Disguise.

The Rogue, #1 of the Rogues of Ravensmuir series of medieval Scottish romances by Claire Delacroix The Scoundrel, #2 of the Rogues of Ravensmuir series of medieval Scottish romances by Claire Delacroix The Heiress, #3 The Princess, #1 of the Bride Quest series of medieval romances by Claire Delacroix  The Beauty, #5 The Princess, #1 of the Bride Quest series of medieval romances by Claire DelacroixThe Temptress, #6 The Princess, #1 of the Bride Quest series of medieval romances by Claire Delacroix  The Rose Red Bride, #2 of the Jewels of Kinfairlie series of medieval Scottish romances by Claire Delacroix The Crusader's Heart, book two of the Champions of St. Euphemia series of medieval romances by Claire Delacroix  The Crusader's Kiss, book three of the Champions of St. Euphemia series of medieval romances by Claire Delacroix  One Knight Enchanted, #1 of the Rogues & Angels series of medieval romances by Claire Delacroix A Duke By Any Other Name, #2 of the Brides of North Barrows series of Regency romances by Claire Delacroix