Step daughter wants to have b day gathering...

My boyfriend and I have been together 6 years. His daughter (who lives with us full time) is turning 17. She wants to go out to dinner with 6 of her friends. I’m really torn on this cause of Covid. I’m 24 weeks pregnant and obviously nervous about getting sick. I don’t want to ruin her birthday but I don’t like being put at risk for a dinner either.

Tentative plan is if she does go that she has to stay in her room primarily for 4 days until she can get tested and gets results to confirm she’s fine. When out in the house she will need to wear a mask and basically can’t be anywhere near me until results are back.

Just looking for opinions on this.