Ah, maybe i should give it a try. I almost always have FoxWife instead,
I'd definitely recommend it during more difficult battles if you prefer to tease your way to victory (like I do). Since most of your companions lack any tease moves beyond, well, Tease (Berwyn does have Charm Spell, and Brint has one that deals both lust and hp damage I think), being able to bust out two AoE tease moves back to back really helps make say teasing Arona's gang into slutty submission a bit less of a challenge (and even then I wind up losing sometimes). Plus it gives your whole party a boost to sexiness for five turns, making their Tease attacks better.
On the other hand, I do love me some FoxWife.
I always gear my character up for max sexiness, and I prefer having the girlier companions in my party (Cait's kind of the constant because of her healing, and then I just switch between Ber and Ryn [although if you're strategic enough, you can get by with having both Ber and Ryn in your party and use their Group Heal, but since those moves have longer cooldowns even with two of them it's more risky than having Cait "I can use Heal every turn" in your party]). Of course this makes the few enemies who are immune to lust based attacks more difficult since I kind of lack muscle (Brint) on my preferred teams.