Girlfriend into double penetration - Is it always a good sign or not?

My current GF cums hardest when we're in a threesome, and not so much when just the two of us. She says it's because she likes to be ravaged by two cocks with me in her asshole (my favorite). It's great sex for me too, and I love how much she gets off on it, even though it takes someone else's penis. However, I do wonder if it's because she prefers the feel of a different cock in her pussy (noting the best results are with guys with bigger cocks). I'm not complaining but it would be great to think it wasn't because she was dissatisfied with my penis. Any thoughts from any GFs who also love DP?

My wife likes DP but I just use my fingers or a toy in the other hole to satisfy that desire. Neither of us is into sharing.

Why don’t you ask her? Polyamory is difficult at best and impossible without clear communication. If you’ve concerns you should be talking to her.

Why don’t you ask her? Polyamory is difficult at best and impossible without clear communication. If you’ve concerns you should be talking to her.

She says she loves my cock but feels so wanted when there’s two (or more) erections straining for her, and feels more sensation when her ass is being pleasured at the same time, plus likes the different feel of a new cock. But she wouldn’t hurt my feelings by saying my cock’s not enough for her, hence my query of other’s experiences

Take her at her word then.