Complex sentence: After a drunken night with Chas's cousin, Delilah Dingle, Carl suggested they have a relationship but Del told him to fight for Chas so he declared his love at an army wedding reception, infuriating Chas, especially as Carl tripped while carrying her.
Split into simpler sentences: After a drunken one night stand with Chas's cousin, Delilah Dingle, Carl suggested they have a relationship but Del convinced him to fight for Chas. Once there, he declared his love publicly, making Chas furious, especially as Carl tripped while carrying her.