[MF] how i (F24) turned from pure lesbian to straight due to my gf’s brother (M29)

So we were on vacation with my girlfriend (Alice F 23), his brother (Matt M29) and her brother’s girlfriend (Lola F 31).

We did a lot of these double couple trip with her brother and his gf on week-ends for 2 to 3 days. We kinda had our habits. This time we went in a resort with small bungaloo sized house. 2 bedrooms not very well isolated…

We did a lot of activities as 4 during the days and often split with our half during the evening till we got back home. But this time we went to a nightclub nearby as 4. We all dressed very well for the occasion.

I got a red dress with a deep dive cleavage, small chains around my boobs, high heels, the typical club bitch outfit. I always dress slutty when i go to a club because even though i am not single when we go out with my gf i still like a little visual teasing for the girls inside. i don’t have a perfect figure, small ass (to me), but big boobs quite perky so i can wear dresses without bra and still be toned and sexy and i got mid-back lenght blonde hair and green-brown eyes.