So DS's girlfiriend (Say what you want it seems like a decent relationship they slowly moved into it over a number of years and they've been friends since they were like 5 he's 15 now) her Sister's wedding is coming up. And anyway he knows the family well and gets along with them. He's been invited to the wedding since he is really close with the family (he's like a close cousin to them).
Anyway this invite came from the bride and groom themselves. He wants to go and I'm tempted to let him go. He and his girlfriend are taking a taxi from her house to it (she lives walking distance from our house) and then taking a taxi home.
So do I let him go. It would feel rude not to since
A) he wants to go
B) the bride and groom invited him sorta says he's wanted
C) I know he'd behave he's not the hyper wild teen type when it comes to weddings
Any opinion is appreciated thanks