Complex sentence: If a partner is willing, adult babies may engage in parent-baby roleplay including being bathed, powdered and changed into diapers by one's partner, before being put to bed with a baby bottle.
Split into simpler sentences: If a partner is willing, adult babies may engage in parent-baby roleplay. A typical scenario might then involve being bathed, powdered and changed into diapers by one's partner, before being put to bed with a baby bottle.