If Mary’s body was not assumed to heaven, where are her relics? The Church, especially the Early Church, treasured the relics of her saints. Where are the relics of her most admired saint?
"Apparently", Mary's cloak is in Aachen Germany.
Does that now disprove the assumption?
http://www.sacred-destinations.com/germany/aachen-cathedral
So, if we don't have relics of them, we should "assume"(cough) they have been assumed.
If there is only a second class relic and no first class relic (bones), that further supports the argument for assumption.