Question for the hive mind...

So I know this isn't a problem solving group but I need some advice. My new gf is bi and very submissive. She was actually married to a female for 10ish years. Soooo now she's a bit prudish but still gets soaked when I bring up playing with another couple/female, even though she flat out refuses. Give her time and cross my fingers or put her in a situation with an aggressive female personality or...?