たわむれ わしちゃう
tawamurekawashichau

Godan Verb (su)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of 戯交わす

1. Playing around (with someone); Flirting (and potentially going too far); Having a casual affair (and regretting it)

Completed Action
Colloquial