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 Kiss, #3 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