Wedding Night, was a film (released in 1970), starring Dennis Waterman as Joe O'Reilly (the Groom), and Tessa Wyatt as Mady (Dennis's Bride), I have never seen Wedding Night, the film seems to be quite rare, I wonder, have any members of this forum, ever seen Wedding Night, I found some info, about the film, at the following site - templeofschlock.blogspot.co.uk/2012/06/endangered-list-case-file-121.html
Also appearing in Wedding Night, were Alexandra Bastedo and Eddie Byrne.
Wedding Night, featured Tessa Wyatt in her film debut, Tessa, only appeared in three more films (all in the 1970's).
The original title of the film, was, I can't... I can't.