Rainbow If you should want practical advice I think every lesbian in a long term relationship has dealt with this issue. Feel free to pm me. I don't want to give you advice you don't want.
I don't have first hand (no pun intended) experience as I have more issues with going off like a firecracker and have to work at not orgasming too FAST. But my partner has struggled with this a few times and we've worked through it each time.