home-wrecking1
/ˈhəʊmˌrɛkɪŋ/noun
The action of ruining a family, home, or relationship; especially the action of breaking up a marriage or similar long-term relationship by having an affair with one of the partners.
Origin
Late 19th century; earliest use found in Wonderful London. From home + wrecking.
home-wrecking2
/ˈhəʊmˌrɛkɪŋ/depreciative
adjective
Designating a person who or thing which ruins or breaks up a family, home, or relationship; specifically designating a person blamed for the break-up of a marriage because of an affair with one of the partners.
Origin
Late 19th century. From home + wrecking. Compare home-wrecker, home-wrecking.