How old are the daughters ?
The black prince had younger brothers, Lionel of Antwerp, John of Gaunt, Edmund of Langley and Thomas of Woodstock; so they might be favoured over a daughter of the Black Prince (Edward of Woodstock).
John of Gaunt succeeds unless Edward III alters his entail of the crown.
And the BP's eldest daughter finds herself (Papal dispensation permitting) promptly betrothed to her cousin, the future Henry IV.