攀親

to seek to profit by family ties

to climb (by pulling oneself up) / to implicate / to claim connections of higher status

parent / one's own (flesh and blood) / relative / related / marriage / bride / close / intimate / in person / first-hand / in favor of / pro- / to kiss / (Internet slang) dear

parents-in-law of one's offspring

to use claims to kinship or friendship to climb socially (idiom)