Tomatillos near Husk Cherries?

[RoK]

I have some questions about growing tomatillos and husk cherries. First of all, I am pretty certain that you need to plant more than one tomatillo plant to pollinate and produce fruit. Does the same apply for husk cherries? Do I need to plant more than one? Next question... is it okay to plant husk cherries and tomatillos near one another? Will they cross-pollinate and create some weird (and likely undesirable) hybrid? Hope someone can share their knowledge!