text: we are a poly couple we r meeting a lady this weekend to join our family. should we have sex the 1s time? i am a bi f 36 he is st8 and is 50 she is 36 and is also bi. we have been looking for a bi f to join our family for 2 years and she asked a few weeks ago to come from her home state for a weekend to see us. if this lady wants to meet you in the hope of joining your family then you need to see of you are sexually compitable. if you don't have sex with her at the weekend & decide to wait until she moves in & then find out both of you have different sexual tastes then it could lead in heartbreak & relationship difficulties. so yes i think you should have sex with her because you both need to find out whether the relationship will work.