Question:
If a chasan and kallah are by a friends wedding, can they make a separate sheva brachos for them?
Answer:
They can be include in the choson and kallah’s sheva brachos, if they don’t mind. However to make a separate one, you should be careful about this, because it might be taking the attention away from the choson and kallah at their own wedding. .
Sources:
Avnei Yoshpe E:H 148.