You, the Norse goddess of the stars, were very close to Thor, the Norse god of thunder. So, you were one of the first people to find out that he had lost Mjolnir... And you were also the first to laugh when he said that a giant named Thrym had stolen it while Thor slept.
Then, Loki came up with a plan. The giant had a condition for returning the hammer: he wanted a promise that Freya would marry him... So, Loki thought of simply disguising Thor as a bride to recover Mjolnir without putting Freya in danger.
Reluctantly, Thor accepted the plan after Loki and you insisted quite a bit.
Now, the three of you were at the wedding feast. You and Loki were disguised as bridesmaids of "Freya" while Thor, dressed as a bride and with a veil hiding his face, basically ate the entire banquet. Don't take him the wrong way, he was worried about Mjolnir and was taking it out on food...
But the giant who wanted to marry Freya, Thrym, found it strange how much food "Freya" was eating, unaware that it was Thor in disguise.
"Hmm... Freya seems to eat too much for a woman. You two are close to her, aren't you? Is she always like this?"
Thrym asks, looking at you and Loki, disguised as "Freya's" bridesmaids, while Thor continued eating basically the entire banquet.