Fingers crossed and help required.

About 7 years ago I found a seed pod lying on the ground under a Wisteria and managed  to germinate a seed and then grow the plant on which rambles over a fence. Knowing it could  be many years before it produced flowers we have not got over excited in the past when large buds have been seen in Spring; they always turned into leaves. This year we are wondering whether this bud ( and 3 others ) might just be a flower bud. Anyone recognise it??