r/predicamenthentai
Trapped in space bondage, they have a choice of trying to stay completely still (but it is much harder than sounds, since slightest movements pulls on their nipples), horny and bored.
Or thrash in bondage, stimulating themselves with crotchchains - but also tugging on nipples heavily.
Or come closer to each other to kiss and rub against each other - but eventually force of impulse will separate them and punish severely...
