Relationships and friendships

Edit : imagine down voting me for a question 😂

should my fiance spends the night at his friends house altough we agreed we wont while were engaged. he asked if i can tag along because he wanted me too prefers me being with yk. but hes waiting for a answer his friend dont mind me ask if im hanging out with them if we go out ? Is it odd that. Grown man wants to spend the night with his friend who’s a minor ( 17 and he’s 21 )? Re