same issue as all of you are having - the WeVibe not staying in place during intercourse. My husband & I have been doing 2 other things...
1) with the WeVibe in place (i like the "cha-cha-cha" setting), my husband penetrates deeply & STAYS PUT... meanwhile he plays with my breasts & I come with him doing nothing else.
2) [not for everyone] my husband takes me anally with the WeVibe stimulating my G-spot & clit. mind-blowing!
have fun y'all!