Yeah, you're going to have to explain a little better. Is it that you and he both spend roughly equal time with her sexually but he's more successful at meeting her sexual needs, or does she just engage in sex much more with him than with you (and if so, has she said why), or what?
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.