Stuck and could really use some advice. For the last two years I've been trying to edge my wife closer to cuckolding me by building on the fantasy in our sex life. I'm currently using the Goliath silicone vibrator on her. It's about 1 and 7/8ths thick, but I've been able to work it in with lots of lube. Now she is used to it and she cums HARD with it, according to her on a scale of 1 to 10, it's a 16. Of course, I couple it with clitoral stimulation with my tongue and a vibrating egg, while she watches cuckolding videos like 'Screw My Wife' and 'Milf's like it Big'- she likes the plots.
So, this is pretty good but I could use some advice on moving forward. I would prefer recommendations that are a little more obtuse, because I know that I should just tell her but I'm afraid that she will react very poorly. I'm therefore thinking that if I stay persistently moving in this direction I could get there. Any thoughts on what to do next aside from just blurting it out as a request?
Also, I have been searching for a thicker silicone vibrator for about two years with no luck. Other materials she has a negative/allergic reaction to. I know that Vixen Creations has a silicone dildo over two inches thick, but no vibration. Anybody have any suggestions on that? Video suggestions? Anything that could help?