Tips for going penetration-free?

[Spellbind9750]

I fall in that very odd sub-category of dominant cuckold. I have her trained for anal-only bareback sex with men she meets and me but she wants to decide what guys she hooks up with. I relented in the hopes she'd start preferring other men's cocks over mine but it hasn't happened yet so finally I sat her down and said I don't want her to take my cock in her ass anymore, just other's. Taking my cock is how she feels close to me, especially when she's come home from just recently fucking a guy.

So the compromise we've arrived at is to take my cock in her ass only when I'm reclaiming her after a night out.

Any tips to get her to convert completely? I'm thinking to just cum really quickly when I reclaim her or else cum just as I'm about to enter her.