Secure?

Philidor1792 - guest 1123
Internet game, 2012

In this Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) endgame, Black has an extra Knight to offset White's two Kingside (connected, passed) pawns. His well-placed King is also a serious asset. Should he take a moment to secure his monarch with 25...b5?

(While it may look "positionally motivated", 25...b5 was followed by 26.Nf6, checkmate.)