A more involved family tree for your perusal, this one focusing on Derpy and her much-treasured Trissie!

Their children are Dinky (via Derpy), Twist (via Trissie) and their mutually adoptive son Forever Stamp ("Forry"). Ponet is Derpy's friend and sperm donor (also Dinky's godfather), Briar is Trissie's ex-husband, and Trixie is Derpy and Trissie's surrogate (and Forry's godmother). Forry's sire is a pegasus whom we don't necessarily meet; Trixie was helping a couple to conceive, but they bolted and left her with the kid. Family friends Trissie and Derpy wanted to adopt him, and the rest is history. Get it? Good.